From e0772fa751b1c6bd30111fcbef3de08a1888c65b Mon Sep 17 00:00:00 2001
From: John Kerl <kerl.john.r@gmail.com>
Date: Tue, 24 Nov 2015 21:03:59 -0500
Subject: [PATCH] allow scientific notation in function literals, as in field
 values

---
 c/reg_test/expected/out | 1487 +++++++++++++++++++++------------------
 1 file changed, 814 insertions(+), 673 deletions(-)

diff --git a/c/reg_test/expected/out b/c/reg_test/expected/out
index 92cbbad18..deae9d4b9 100644
--- a/c/reg_test/expected/out
+++ b/c/reg_test/expected/out
@@ -2,7 +2,7 @@
 ================================================================
 STATELESS MAPPERS
 
-mlr cat reg_test/input/abixy
+mlr cat ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -16,7 +16,7 @@ a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
 mlr cat /dev/null
 
-mlr cat -n reg_test/input/abixy
+mlr cat -n ./reg_test/input/abixy
 n=0,a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 n=1,a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 n=2,a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -28,7 +28,7 @@ n=7,a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 n=8,a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 n=9,a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr cat -N counter reg_test/input/abixy
+mlr cat -N counter ./reg_test/input/abixy
 counter=0,a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 counter=1,a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 counter=2,a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -40,7 +40,7 @@ counter=7,a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 counter=8,a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 counter=9,a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr cut -f a,x reg_test/input/abixy
+mlr cut -f a,x ./reg_test/input/abixy
 a=pan,x=0.3467901443380824
 a=eks,x=0.7586799647899636
 a=wye,x=0.20460330576630303
@@ -52,7 +52,7 @@ a=zee,x=0.5985540091064224
 a=hat,x=0.03144187646093577
 a=pan,x=0.5026260055412137
 
-mlr cut --complement -f a,x reg_test/input/abixy
+mlr cut --complement -f a,x ./reg_test/input/abixy
 b=pan,i=1,y=0.7268028627434533
 b=pan,i=2,y=0.5221511083334797
 b=wye,i=3,y=0.33831852551664776
@@ -64,7 +64,7 @@ b=wye,i=8,y=0.976181385699006
 b=wye,i=9,y=0.7495507603507059
 b=wye,i=10,y=0.9526183602969864
 
-mlr cut -r -f c,e reg_test/input/having-fields-regex.dkvp
+mlr cut -r -f c,e ./reg_test/input/having-fields-regex.dkvp
 abc=1,def=11
 
 abcd=3
@@ -72,7 +72,7 @@ abcd=3
 abcde=5
 
 
-mlr cut -r -f "C","E" reg_test/input/having-fields-regex.dkvp
+mlr cut -r -f "C","E" ./reg_test/input/having-fields-regex.dkvp
 
 ABC=2,DEF=12
 
@@ -80,7 +80,7 @@ ABCD=4
 
 ABCDE=6
 
-mlr cut -r -f "c"i,"e" reg_test/input/having-fields-regex.dkvp
+mlr cut -r -f "c"i,"e" ./reg_test/input/having-fields-regex.dkvp
 abc=1,def=11
 ABC=2
 abcd=3
@@ -88,7 +88,7 @@ ABCD=4
 abcde=5
 ABCDE=6
 
-mlr cut -r -f "C"i,"E" reg_test/input/having-fields-regex.dkvp
+mlr cut -r -f "C"i,"E" ./reg_test/input/having-fields-regex.dkvp
 abc=1
 ABC=2,DEF=12
 abcd=3
@@ -96,7 +96,7 @@ ABCD=4
 abcde=5
 ABCDE=6
 
-mlr cut -r -x -f c,e reg_test/input/having-fields-regex.dkvp
+mlr cut -r -x -f c,e ./reg_test/input/having-fields-regex.dkvp
 
 ABC=2,DEF=12
 ghi=13
@@ -104,7 +104,7 @@ ABCD=4,GHI=14
 ghi=15
 ABCDE=6,GHI=16
 
-mlr cut -r -x -f "C","E" reg_test/input/having-fields-regex.dkvp
+mlr cut -r -x -f "C","E" ./reg_test/input/having-fields-regex.dkvp
 abc=1,def=11
 
 abcd=3,ghi=13
@@ -112,7 +112,7 @@ GHI=14
 abcde=5,ghi=15
 GHI=16
 
-mlr cut -r -x -f "C","E"i reg_test/input/having-fields-regex.dkvp
+mlr cut -r -x -f "C","E"i ./reg_test/input/having-fields-regex.dkvp
 abc=1
 
 abcd=3,ghi=13
@@ -120,7 +120,7 @@ GHI=14
 ghi=15
 GHI=16
 
-mlr cut -r -x -f "c","e"i reg_test/input/having-fields-regex.dkvp
+mlr cut -r -x -f "c","e"i ./reg_test/input/having-fields-regex.dkvp
 
 ABC=2
 ghi=13
@@ -128,7 +128,7 @@ ABCD=4,GHI=14
 ghi=15
 GHI=16
 
-mlr --csvlite cut -r -f ^Name$,^Date_[0-9].*$ reg_test/input/date1.csv reg_test/input/date2.csv
+mlr --csvlite cut -r -f ^Name$,^Date_[0-9].*$ ./reg_test/input/date1.csv ./reg_test/input/date2.csv
 Name,Date_201505
 Alice,2015-05-14
 Bob,2015-05-11
@@ -141,7 +141,7 @@ Denise,2015-06-17
 Chuck,2015-06-19
 Bob,2015-06-19
 
-mlr having-fields --at-least a,b reg_test/input/abixy
+mlr having-fields --at-least a,b ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -153,9 +153,9 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr having-fields --at-least a,c reg_test/input/abixy
+mlr having-fields --at-least a,c ./reg_test/input/abixy
 
-mlr having-fields --at-least a,b,i,x,y reg_test/input/abixy
+mlr having-fields --at-least a,b,i,x,y ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -167,9 +167,9 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr having-fields --which-are a,b,i,x reg_test/input/abixy
+mlr having-fields --which-are a,b,i,x ./reg_test/input/abixy
 
-mlr having-fields --which-are a,b,i,x,y reg_test/input/abixy
+mlr having-fields --which-are a,b,i,x,y ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -181,7 +181,7 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr having-fields --which-are a,b,i,y,x reg_test/input/abixy
+mlr having-fields --which-are a,b,i,y,x ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -193,13 +193,13 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr having-fields --which-are a,b,i,x,w reg_test/input/abixy
+mlr having-fields --which-are a,b,i,x,w ./reg_test/input/abixy
 
-mlr having-fields --which-are a,b,i,x,y,z reg_test/input/abixy
+mlr having-fields --which-are a,b,i,x,y,z ./reg_test/input/abixy
 
-mlr having-fields --at-most a,c reg_test/input/abixy
+mlr having-fields --at-most a,c ./reg_test/input/abixy
 
-mlr having-fields --at-most a,b,i,x,y reg_test/input/abixy
+mlr having-fields --at-most a,b,i,x,y ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -211,7 +211,7 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr having-fields --at-most a,b,i,x,y,z reg_test/input/abixy
+mlr having-fields --at-most a,b,i,x,y,z ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -223,24 +223,24 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr having-fields --all-matching "^[a-z][a-z][a-z]$" reg_test/input/having-fields-regex.dkvp
+mlr having-fields --all-matching "^[a-z][a-z][a-z]$" ./reg_test/input/having-fields-regex.dkvp
 abc=1,def=11
 
-mlr having-fields --any-matching "^[a-z][a-z][a-z]$" reg_test/input/having-fields-regex.dkvp
+mlr having-fields --any-matching "^[a-z][a-z][a-z]$" ./reg_test/input/having-fields-regex.dkvp
 abc=1,def=11
 abcd=3,ghi=13
 abcde=5,ghi=15
 
-mlr having-fields --none-matching "^[a-z][a-z][a-z]$" reg_test/input/having-fields-regex.dkvp
+mlr having-fields --none-matching "^[a-z][a-z][a-z]$" ./reg_test/input/having-fields-regex.dkvp
 ABC=2,DEF=12
 ABCD=4,GHI=14
 ABCDE=6,GHI=16
 
-mlr having-fields --all-matching "^[a-z][a-z][a-z]$"i reg_test/input/having-fields-regex.dkvp
+mlr having-fields --all-matching "^[a-z][a-z][a-z]$"i ./reg_test/input/having-fields-regex.dkvp
 abc=1,def=11
 ABC=2,DEF=12
 
-mlr having-fields --any-matching "^[a-z][a-z][a-z]$"i reg_test/input/having-fields-regex.dkvp
+mlr having-fields --any-matching "^[a-z][a-z][a-z]$"i ./reg_test/input/having-fields-regex.dkvp
 abc=1,def=11
 ABC=2,DEF=12
 abcd=3,ghi=13
@@ -248,9 +248,9 @@ ABCD=4,GHI=14
 abcde=5,ghi=15
 ABCDE=6,GHI=16
 
-mlr having-fields --none-matching "^[a-z][a-z][a-z]$"i reg_test/input/having-fields-regex.dkvp
+mlr having-fields --none-matching "^[a-z][a-z][a-z]$"i ./reg_test/input/having-fields-regex.dkvp
 
-mlr rename b,BEE,x,EKS reg_test/input/abixy
+mlr rename b,BEE,x,EKS ./reg_test/input/abixy
 a=pan,BEE=pan,i=1,EKS=0.3467901443380824,y=0.7268028627434533
 a=eks,BEE=pan,i=2,EKS=0.7586799647899636,y=0.5221511083334797
 a=wye,BEE=wye,i=3,EKS=0.20460330576630303,y=0.33831852551664776
@@ -262,7 +262,7 @@ a=zee,BEE=wye,i=8,EKS=0.5985540091064224,y=0.976181385699006
 a=hat,BEE=wye,i=9,EKS=0.03144187646093577,y=0.7495507603507059
 a=pan,BEE=wye,i=10,EKS=0.5026260055412137,y=0.9526183602969864
 
-mlr rename nonesuch,nonesuch,x,EKS reg_test/input/abixy
+mlr rename nonesuch,nonesuch,x,EKS ./reg_test/input/abixy
 a=pan,b=pan,i=1,EKS=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,EKS=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,EKS=0.20460330576630303,y=0.33831852551664776
@@ -274,7 +274,7 @@ a=zee,b=wye,i=8,EKS=0.5985540091064224,y=0.976181385699006
 a=hat,b=wye,i=9,EKS=0.03144187646093577,y=0.7495507603507059
 a=pan,b=wye,i=10,EKS=0.5026260055412137,y=0.9526183602969864
 
-mlr --csvlite rename -r ^Date_[0-9].*$,Date reg_test/input/date1.csv reg_test/input/date2.csv
+mlr --csvlite rename -r ^Date_[0-9].*$,Date ./reg_test/input/date1.csv ./reg_test/input/date2.csv
 Name,Date,Extraneous
 Alice,2015-05-14,foo
 Bob,2015-05-11,bar
@@ -285,7 +285,7 @@ Denise,2015-06-17,feed
 Chuck,2015-06-19,beef
 Bob,2015-06-19,d00d
 
-mlr --csvlite rename -r (.*)e(.*),\1EEE\2 reg_test/input/date1.csv reg_test/input/date2.csv
+mlr --csvlite rename -r (.*)e(.*),\1EEE\2 ./reg_test/input/date1.csv ./reg_test/input/date2.csv
 NamEEE,DatEEE_201505,ExtranEEEous
 Alice,2015-05-14,foo
 Bob,2015-05-11,bar
@@ -298,7 +298,7 @@ Denise,2015-06-17,feed
 Chuck,2015-06-19,beef
 Bob,2015-06-19,d00d
 
-mlr --csvlite rename -r "(.*)e(.*)"i,\1EEE\2 reg_test/input/date1.csv reg_test/input/date2.csv
+mlr --csvlite rename -r "(.*)e(.*)"i,\1EEE\2 ./reg_test/input/date1.csv ./reg_test/input/date2.csv
 NamEEE,DatEEE_201505,ExtranEEEous
 Alice,2015-05-14,foo
 Bob,2015-05-11,bar
@@ -311,7 +311,7 @@ Denise,2015-06-17,feed
 Chuck,2015-06-19,beef
 Bob,2015-06-19,d00d
 
-mlr --csvlite rename -r -g "(.*)e(.*)"i,\1EEE\2 reg_test/input/date1.csv reg_test/input/date2.csv
+mlr --csvlite rename -r -g "(.*)e(.*)"i,\1EEE\2 ./reg_test/input/date1.csv ./reg_test/input/date2.csv
 NamEEE,DatEEE_201505,ExtranEEEous
 Alice,2015-05-14,foo
 Bob,2015-05-11,bar
@@ -324,7 +324,7 @@ Denise,2015-06-17,feed
 Chuck,2015-06-19,beef
 Bob,2015-06-19,d00d
 
-mlr --csvlite rename -r "e",EEE reg_test/input/date1.csv reg_test/input/date2.csv
+mlr --csvlite rename -r "e",EEE ./reg_test/input/date1.csv ./reg_test/input/date2.csv
 NamEEE,DatEEE_201505,ExtranEEEous
 Alice,2015-05-14,foo
 Bob,2015-05-11,bar
@@ -337,7 +337,7 @@ Denise,2015-06-17,feed
 Chuck,2015-06-19,beef
 Bob,2015-06-19,d00d
 
-mlr --csvlite rename -r -g "e",EEE reg_test/input/date1.csv reg_test/input/date2.csv
+mlr --csvlite rename -r -g "e",EEE ./reg_test/input/date1.csv ./reg_test/input/date2.csv
 NamEEE,DatEEE_201505,ExtranEEEous
 Alice,2015-05-14,foo
 Bob,2015-05-11,bar
@@ -350,7 +350,7 @@ Denise,2015-06-17,feed
 Chuck,2015-06-19,beef
 Bob,2015-06-19,d00d
 
-mlr --csvlite rename -r "e"i,EEE reg_test/input/date1.csv reg_test/input/date2.csv
+mlr --csvlite rename -r "e"i,EEE ./reg_test/input/date1.csv ./reg_test/input/date2.csv
 NamEEE,DatEEE_201505,EEExtraneous
 Alice,2015-05-14,foo
 Bob,2015-05-11,bar
@@ -363,7 +363,7 @@ Denise,2015-06-17,feed
 Chuck,2015-06-19,beef
 Bob,2015-06-19,d00d
 
-mlr --csvlite rename -r -g "e"i,EEE reg_test/input/date1.csv reg_test/input/date2.csv
+mlr --csvlite rename -r -g "e"i,EEE ./reg_test/input/date1.csv ./reg_test/input/date2.csv
 NamEEE,DatEEE_201505,EEExtranEEEous
 Alice,2015-05-14,foo
 Bob,2015-05-11,bar
@@ -376,12 +376,12 @@ Denise,2015-06-17,feed
 Chuck,2015-06-19,beef
 Bob,2015-06-19,d00d
 
-mlr regularize reg_test/input/regularize.dkvp
+mlr regularize ./reg_test/input/regularize.dkvp
 a=1,c=2,b=3
 e=4,d=5
 a=6,c=7,b=8
 
-mlr --opprint bar -f x,y --lo 0 --hi 1 reg_test/input/abixy
+mlr --opprint bar -f x,y --lo 0 --hi 1 ./reg_test/input/abixy
 a   b   i  x                                        y
 pan pan 1  *************........................... *****************************...........
 eks pan 2  ******************************.......... ********************....................
@@ -394,7 +394,7 @@ zee wye 8  ***********************................. ****************************
 hat wye 9  *....................................... *****************************...........
 pan wye 10 ********************.................... **************************************..
 
-mlr --opprint bar -f x,y -c c -x x -b b --lo 0.1 --hi 0.9 -w 20 reg_test/input/abixy
+mlr --opprint bar -f x,y -c c -x x -b b --lo 0.1 --hi 0.9 -w 20 ./reg_test/input/abixy
 a   b   i  x                    y
 pan pan 1  ccccccbbbbbbbbbbbbbb cccccccccccccccbbbbb
 eks pan 2  ccccccccccccccccbbbb ccccccccccbbbbbbbbbb
@@ -411,7 +411,7 @@ pan wye 10 ccccccccccbbbbbbbbbb cccccccccccccccccccx
 ================================================================
 TRIVIAL RETAINERS
 
-mlr group-by a reg_test/input/abixy
+mlr group-by a ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
@@ -423,7 +423,7 @@ a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 
-mlr group-by a,b reg_test/input/abixy
+mlr group-by a,b ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -435,7 +435,7 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr group-like reg_test/input/het.dkvp
+mlr group-like ./reg_test/input/het.dkvp
 host=jupiter
 host=saturn
 host=mars
@@ -449,7 +449,7 @@ df/tmp=0.04MB,uptime=890sec
 df/tmp=8.55MB,uptime=787897777sec
 df/tmp=9.47MB,uptime=234289080sec
 
-mlr tac reg_test/input/abixy
+mlr tac ./reg_test/input/abixy
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
@@ -467,11 +467,11 @@ mlr tac /dev/null
 ================================================================
 HEAD/TAIL/ETC.
 
-mlr head -n 2 reg_test/input/abixy-het
+mlr head -n 2 ./reg_test/input/abixy-het
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 
-mlr head -n 2 -g a reg_test/input/abixy-het
+mlr head -n 2 -g a ./reg_test/input/abixy-het
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=eks,bbb=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
@@ -480,7 +480,7 @@ a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
 a=zee,b=wye,i=8,x=0.5985540091064224,yyy=0.976181385699006
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr head -n 2 -g a,b reg_test/input/abixy-het
+mlr head -n 2 -g a,b ./reg_test/input/abixy-het
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=pan,i=5,xxx=0.5732889198020006,y=0.8636244699032729
@@ -489,11 +489,11 @@ a=eks,b=zee,iii=7,x=0.6117840605678454,y=0.1878849191181694
 a=zee,b=wye,i=8,x=0.5985540091064224,yyy=0.976181385699006
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr tail -n 2 reg_test/input/abixy-het
+mlr tail -n 2 ./reg_test/input/abixy-het
 aaa=hat,bbb=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr tail -n 2 -g a reg_test/input/abixy-het
+mlr tail -n 2 -g a ./reg_test/input/abixy-het
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 a=eks,bbb=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
@@ -502,7 +502,7 @@ a=wye,b=pan,i=5,xxx=0.5732889198020006,y=0.8636244699032729
 a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
 a=zee,b=wye,i=8,x=0.5985540091064224,yyy=0.976181385699006
 
-mlr tail -n 2 -g a,b reg_test/input/abixy-het
+mlr tail -n 2 -g a,b ./reg_test/input/abixy-het
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=pan,i=5,xxx=0.5732889198020006,y=0.8636244699032729
@@ -511,11 +511,11 @@ a=eks,b=zee,iii=7,x=0.6117840605678454,y=0.1878849191181694
 a=zee,b=wye,i=8,x=0.5985540091064224,yyy=0.976181385699006
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr top -f x,y -n 2 reg_test/input/abixy-het
+mlr top -f x,y -n 2 ./reg_test/input/abixy-het
 top_idx=1,x_top=0.758680,y_top=0.952618
 top_idx=2,x_top=0.611784,y_top=0.749551
 
-mlr top -f x,y -n 2 -g a reg_test/input/abixy-het
+mlr top -f x,y -n 2 -g a ./reg_test/input/abixy-het
 a=pan,top_idx=1,x_top=0.502626,y_top=0.952618
 a=pan,top_idx=2,x_top=0.346790,y_top=0.726803
 a=eks,top_idx=1,x_top=0.758680,y_top=0.522151
@@ -523,7 +523,7 @@ a=eks,top_idx=2,x_top=0.611784,y_top=0.187885
 a=zee,top_idx=1,x_top=0.527126,y_top=0.493221
 a=zee,top_idx=2,x_top=,y_top=
 
-mlr top -f x,y -n 2 -g a,b reg_test/input/abixy-het
+mlr top -f x,y -n 2 -g a,b ./reg_test/input/abixy-het
 a=pan,b=pan,top_idx=1,x_top=0.346790,y_top=0.726803
 a=pan,b=pan,top_idx=2,x_top=,y_top=
 a=eks,b=pan,top_idx=1,x_top=0.758680,y_top=0.522151
@@ -535,11 +535,11 @@ a=eks,b=zee,top_idx=2,x_top=,y_top=
 a=pan,b=wye,top_idx=1,x_top=0.502626,y_top=0.952618
 a=pan,b=wye,top_idx=2,x_top=,y_top=
 
-mlr --seed 12345 sample -k 2 reg_test/input/abixy-het
+mlr --seed 12345 sample -k 2 ./reg_test/input/abixy-het
 aaa=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 
-mlr --seed 12345 sample -k 2 -g a reg_test/input/abixy-het
+mlr --seed 12345 sample -k 2 -g a ./reg_test/input/abixy-het
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
@@ -548,7 +548,7 @@ a=wye,b=pan,i=5,xxx=0.5732889198020006,y=0.8636244699032729
 a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
 a=zee,b=wye,i=8,x=0.5985540091064224,yyy=0.976181385699006
 
-mlr --seed 12345 sample -k 2 -g a,b reg_test/input/abixy-het
+mlr --seed 12345 sample -k 2 -g a,b ./reg_test/input/abixy-het
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=pan,i=5,xxx=0.5732889198020006,y=0.8636244699032729
@@ -557,13 +557,13 @@ a=eks,b=zee,iii=7,x=0.6117840605678454,y=0.1878849191181694
 a=zee,b=wye,i=8,x=0.5985540091064224,yyy=0.976181385699006
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr uniq -g a reg_test/input/abixy-het
+mlr uniq -g a ./reg_test/input/abixy-het
 a=pan
 a=eks
 a=wye
 a=zee
 
-mlr uniq -g a,b reg_test/input/abixy-het
+mlr uniq -g a,b ./reg_test/input/abixy-het
 a=pan,b=pan
 a=eks,b=pan
 a=wye,b=pan
@@ -572,13 +572,13 @@ a=eks,b=zee
 a=zee,b=wye
 a=pan,b=wye
 
-mlr uniq -c -g a reg_test/input/abixy-het
+mlr uniq -c -g a ./reg_test/input/abixy-het
 a=pan,count=2
 a=eks,count=3
 a=wye,count=1
 a=zee,count=2
 
-mlr uniq -c -g a,b reg_test/input/abixy-het
+mlr uniq -c -g a,b ./reg_test/input/abixy-het
 a=pan,b=pan,count=1
 a=eks,b=pan,count=1
 a=wye,b=pan,count=1
@@ -587,14 +587,14 @@ a=eks,b=zee,count=1
 a=zee,b=wye,count=1
 a=pan,b=wye,count=1
 
-mlr count-distinct -f a reg_test/input/small reg_test/input/abixy
+mlr count-distinct -f a ./reg_test/input/small ./reg_test/input/abixy
 a=pan,count=4
 a=eks,count=6
 a=wye,count=4
 a=zee,count=4
 a=hat,count=2
 
-mlr count-distinct -f a,b reg_test/input/small reg_test/input/abixy
+mlr count-distinct -f a,b ./reg_test/input/small ./reg_test/input/abixy
 a=pan,b=pan,count=2
 a=eks,b=pan,count=2
 a=wye,b=wye,count=2
@@ -606,14 +606,14 @@ a=zee,b=wye,count=2
 a=hat,b=wye,count=2
 a=pan,b=wye,count=2
 
-mlr grep pan reg_test/input/abixy-het
+mlr grep pan ./reg_test/input/abixy-het
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=pan,i=5,xxx=0.5732889198020006,y=0.8636244699032729
 a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr grep -v pan reg_test/input/abixy-het
+mlr grep -v pan ./reg_test/input/abixy-het
 aaa=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=eks,bbb=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
 a=eks,b=zee,iii=7,x=0.6117840605678454,y=0.1878849191181694
@@ -624,7 +624,7 @@ aaa=hat,bbb=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 ================================================================
 SORT
 
-mlr sort -f a reg_test/input/abixy
+mlr sort -f a ./reg_test/input/abixy
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=eks,b=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
@@ -636,7 +636,7 @@ a=wye,b=pan,i=5,x=0.5732889198020006,y=0.8636244699032729
 a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 
-mlr sort -r a reg_test/input/abixy
+mlr sort -r a ./reg_test/input/abixy
 a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -648,7 +648,7 @@ a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=eks,b=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 
-mlr sort -f x reg_test/input/abixy
+mlr sort -f x ./reg_test/input/abixy
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
@@ -660,7 +660,7 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 
-mlr sort -r x reg_test/input/abixy
+mlr sort -r x ./reg_test/input/abixy
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
@@ -672,7 +672,7 @@ a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 
-mlr sort -nf x reg_test/input/abixy
+mlr sort -nf x ./reg_test/input/abixy
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
@@ -684,7 +684,7 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 
-mlr sort -nr x reg_test/input/abixy
+mlr sort -nr x ./reg_test/input/abixy
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
@@ -696,7 +696,7 @@ a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 
-mlr sort -f a,b reg_test/input/abixy
+mlr sort -f a,b ./reg_test/input/abixy
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=eks,b=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
@@ -708,7 +708,7 @@ a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 
-mlr sort -r a,b reg_test/input/abixy
+mlr sort -r a,b ./reg_test/input/abixy
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -720,7 +720,7 @@ a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=eks,b=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 
-mlr sort -f x,y reg_test/input/abixy
+mlr sort -f x,y ./reg_test/input/abixy
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
@@ -732,7 +732,7 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 
-mlr sort -r x,y reg_test/input/abixy
+mlr sort -r x,y ./reg_test/input/abixy
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
@@ -744,7 +744,7 @@ a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 
-mlr sort -nf x,y reg_test/input/abixy
+mlr sort -nf x,y ./reg_test/input/abixy
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
@@ -756,7 +756,7 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 
-mlr sort -nr x,y reg_test/input/abixy
+mlr sort -nr x,y ./reg_test/input/abixy
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
@@ -768,7 +768,7 @@ a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 
-mlr sort -f a -nr x reg_test/input/abixy
+mlr sort -f a -nr x ./reg_test/input/abixy
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=eks,b=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
@@ -780,7 +780,7 @@ a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
 
-mlr sort -nr y -f a reg_test/input/abixy
+mlr sort -nr y -f a ./reg_test/input/abixy
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 a=wye,b=pan,i=5,x=0.5732889198020006,y=0.8636244699032729
@@ -792,7 +792,7 @@ a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=eks,b=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
 
-mlr sort -f a -r b -nf x -nr y reg_test/input/abixy
+mlr sort -f a -r b -nf x -nr y ./reg_test/input/abixy
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=eks,b=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
@@ -804,13 +804,13 @@ a=wye,b=pan,i=5,x=0.5732889198020006,y=0.8636244699032729
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
 
-mlr sort -f x reg_test/input/sort-het.dkvp
+mlr sort -f x ./reg_test/input/sort-het.dkvp
 x=1
 x=2
 x=4
 a=3
 
-mlr sort -r x reg_test/input/sort-het.dkvp
+mlr sort -r x ./reg_test/input/sort-het.dkvp
 x=4
 x=2
 x=1
@@ -820,16 +820,16 @@ a=3
 ================================================================
 TOP
 
-mlr top -n 4 -f x reg_test/input/abixy-wide
+mlr top -n 4 -f x ./reg_test/input/abixy-wide
 top_idx=1,x_top=0.999730
 top_idx=2,x_top=0.999308
 top_idx=3,x_top=0.997339
 top_idx=4,x_top=0.997245
 
-mlr top -n 1 -f x,y reg_test/input/abixy-wide
+mlr top -n 1 -f x,y ./reg_test/input/abixy-wide
 top_idx=1,x_top=0.999730,y_top=0.999522
 
-mlr top -n 4 -f x -g a reg_test/input/abixy-wide
+mlr top -n 4 -f x -g a ./reg_test/input/abixy-wide
 a=cat,top_idx=1,x_top=0.996359
 a=cat,top_idx=2,x_top=0.990588
 a=cat,top_idx=3,x_top=0.990160
@@ -851,20 +851,20 @@ a=hat,top_idx=2,x_top=0.995705
 a=hat,top_idx=3,x_top=0.992879
 a=hat,top_idx=4,x_top=0.989639
 
-mlr top -n 1 -f x,y -g a reg_test/input/abixy-wide
+mlr top -n 1 -f x,y -g a ./reg_test/input/abixy-wide
 a=cat,top_idx=1,x_top=0.996359,y_top=0.997929
 a=pan,top_idx=1,x_top=0.999730,y_top=0.999319
 a=wye,top_idx=1,x_top=0.997339,y_top=0.999450
 a=dog,top_idx=1,x_top=0.997245,y_top=0.999522
 a=hat,top_idx=1,x_top=0.997014,y_top=0.991400
 
-mlr top -a -n 4 -f x reg_test/input/abixy-wide
+mlr top -a -n 4 -f x ./reg_test/input/abixy-wide
 a=pan,b=cat,i=1943,x=0.9997301774748071,y=0.8408385083267972,x2=0.9994604277538093,xy=0.8406116311572011,y2=0.7070093970852334
 a=pan,b=dog,i=552,x=0.9993077485337599,y=0.10019859749555626,x2=0.9986159762796124,xy=0.10012923486952477,y2=0.010039758940076493
 a=wye,b=pan,i=568,x=0.9973387930844961,y=0.5711453274816489,x2=0.9946846681912394,xy=0.569625391586397,y2=0.32620698510412
 a=dog,b=pan,i=1613,x=0.997245171384539,y=0.8188847898688517,x2=0.9944979318497786,xy=0.8166289026169553,y2=0.6705722990785534
 
-mlr top -a -n 4 -f x -g a reg_test/input/abixy-wide
+mlr top -a -n 4 -f x -g a ./reg_test/input/abixy-wide
 a=cat,b=dog,i=901,x=0.9963591865818606,y=0.9423606044154952,x2=0.9927316286860669,xy=0.9389296452822133,y2=0.8880435087543374
 a=cat,b=wye,i=135,x=0.9905881531288986,y=0.7789092765450115,x2=0.9812648891193222,xy=0.7715783017076895,y2=0.6066996610878732
 a=cat,b=hat,i=975,x=0.9901595235021967,y=0.8592860989306361,x2=0.9804158819820973,xy=0.8508303142692202,y2=0.738372599815431
@@ -890,7 +890,7 @@ a=hat,b=dog,i=1768,x=0.9896393441122658,y=0.5323182982465756,x2=0.97938603141495
 ================================================================
 JOIN
 
-mlr --opprint join -f reg_test/input/joina.dkvp -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -f ./reg_test/input/joina.dkvp -l l -r r -j o ./reg_test/input/joinb.dkvp
 o x y
 1 a s
 2 b t
@@ -906,7 +906,7 @@ o x y
 3 e y
 3 f y
 
-mlr --opprint join -u -f reg_test/input/joina.dkvp -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -u -f ./reg_test/input/joina.dkvp -l l -r r -j o ./reg_test/input/joinb.dkvp
 o x y
 1 a s
 2 b t
@@ -922,7 +922,7 @@ o x y
 3 e y
 3 f y
 
-mlr --opprint join --ul -f reg_test/input/joina.dkvp -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join --ul -f ./reg_test/input/joina.dkvp -l l -r r -j o ./reg_test/input/joinb.dkvp
 o x y
 1 a s
 2 b t
@@ -941,7 +941,7 @@ o x y
 l x
 4 g
 
-mlr --opprint join -u --ul -f reg_test/input/joina.dkvp -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -u --ul -f ./reg_test/input/joina.dkvp -l l -r r -j o ./reg_test/input/joinb.dkvp
 o x y
 1 a s
 2 b t
@@ -960,7 +960,7 @@ o x y
 l x
 4 g
 
-mlr --opprint join --ur -f reg_test/input/joina.dkvp -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o ./reg_test/input/joinb.dkvp
 o x y
 1 a s
 2 b t
@@ -979,7 +979,7 @@ o x y
 r y
 5 z
 
-mlr --opprint join -u --ur -f reg_test/input/joina.dkvp -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -u --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o ./reg_test/input/joinb.dkvp
 o x y
 1 a s
 2 b t
@@ -998,7 +998,7 @@ o x y
 r y
 5 z
 
-mlr --opprint join --ul --ur -f reg_test/input/joina.dkvp -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join --ul --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o ./reg_test/input/joinb.dkvp
 o x y
 1 a s
 2 b t
@@ -1020,7 +1020,7 @@ l x
 r y
 5 z
 
-mlr --opprint join -u --ul --ur -f reg_test/input/joina.dkvp -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -u --ul --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o ./reg_test/input/joinb.dkvp
 o x y
 1 a s
 2 b t
@@ -1042,45 +1042,45 @@ r y
 l x
 4 g
 
-mlr --opprint join --np --ul -f reg_test/input/joina.dkvp -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join --np --ul -f ./reg_test/input/joina.dkvp -l l -r r -j o ./reg_test/input/joinb.dkvp
 l x
 4 g
 
-mlr --opprint join -u --np --ul -f reg_test/input/joina.dkvp -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -u --np --ul -f ./reg_test/input/joina.dkvp -l l -r r -j o ./reg_test/input/joinb.dkvp
 l x
 4 g
 
-mlr --opprint join --np --ur -f reg_test/input/joina.dkvp -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join --np --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o ./reg_test/input/joinb.dkvp
 r y
 5 z
 
-mlr --opprint join -u --np --ur -f reg_test/input/joina.dkvp -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -u --np --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o ./reg_test/input/joinb.dkvp
 r y
 5 z
 
-mlr --opprint join --np --ul --ur -f reg_test/input/joina.dkvp -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join --np --ul --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o ./reg_test/input/joinb.dkvp
 l x
 4 g
 
 r y
 5 z
 
-mlr --opprint join -u --np --ul --ur -f reg_test/input/joina.dkvp -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -u --np --ul --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o ./reg_test/input/joinb.dkvp
 r y
 5 z
 
 l x
 4 g
 
-mlr --opprint join -f /dev/null -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -f /dev/null -l l -r r -j o ./reg_test/input/joinb.dkvp
 
-mlr --opprint join -u -f /dev/null -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -u -f /dev/null -l l -r r -j o ./reg_test/input/joinb.dkvp
 
-mlr --opprint join --ul -f /dev/null -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join --ul -f /dev/null -l l -r r -j o ./reg_test/input/joinb.dkvp
 
-mlr --opprint join -u --ul -f /dev/null -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -u --ul -f /dev/null -l l -r r -j o ./reg_test/input/joinb.dkvp
 
-mlr --opprint join --ur -f /dev/null -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join --ur -f /dev/null -l l -r r -j o ./reg_test/input/joinb.dkvp
 r y
 1 s
 2 t
@@ -1090,7 +1090,7 @@ r y
 3 y
 5 z
 
-mlr --opprint join -u --ur -f /dev/null -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -u --ur -f /dev/null -l l -r r -j o ./reg_test/input/joinb.dkvp
 r y
 1 s
 2 t
@@ -1100,7 +1100,7 @@ r y
 3 y
 5 z
 
-mlr --opprint join --ul --ur -f /dev/null -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join --ul --ur -f /dev/null -l l -r r -j o ./reg_test/input/joinb.dkvp
 r y
 1 s
 2 t
@@ -1110,7 +1110,7 @@ r y
 3 y
 5 z
 
-mlr --opprint join -u --ul --ur -f /dev/null -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -u --ul --ur -f /dev/null -l l -r r -j o ./reg_test/input/joinb.dkvp
 r y
 1 s
 2 t
@@ -1120,11 +1120,11 @@ r y
 3 y
 5 z
 
-mlr --opprint join --np --ul -f /dev/null -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join --np --ul -f /dev/null -l l -r r -j o ./reg_test/input/joinb.dkvp
 
-mlr --opprint join -u --np --ul -f /dev/null -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -u --np --ul -f /dev/null -l l -r r -j o ./reg_test/input/joinb.dkvp
 
-mlr --opprint join --np --ur -f /dev/null -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join --np --ur -f /dev/null -l l -r r -j o ./reg_test/input/joinb.dkvp
 r y
 1 s
 2 t
@@ -1134,7 +1134,7 @@ r y
 3 y
 5 z
 
-mlr --opprint join -u --np --ur -f /dev/null -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -u --np --ur -f /dev/null -l l -r r -j o ./reg_test/input/joinb.dkvp
 r y
 1 s
 2 t
@@ -1144,7 +1144,7 @@ r y
 3 y
 5 z
 
-mlr --opprint join --np --ul --ur -f /dev/null -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join --np --ul --ur -f /dev/null -l l -r r -j o ./reg_test/input/joinb.dkvp
 r y
 1 s
 2 t
@@ -1154,7 +1154,7 @@ r y
 3 y
 5 z
 
-mlr --opprint join -u --np --ul --ur -f /dev/null -l l -r r -j o reg_test/input/joinb.dkvp
+mlr --opprint join -u --np --ul --ur -f /dev/null -l l -r r -j o ./reg_test/input/joinb.dkvp
 r y
 1 s
 2 t
@@ -1164,11 +1164,11 @@ r y
 3 y
 5 z
 
-mlr --opprint join -f reg_test/input/joina.dkvp -l l -r r -j o /dev/null
+mlr --opprint join -f ./reg_test/input/joina.dkvp -l l -r r -j o /dev/null
 
-mlr --opprint join -u -f reg_test/input/joina.dkvp -l l -r r -j o /dev/null
+mlr --opprint join -u -f ./reg_test/input/joina.dkvp -l l -r r -j o /dev/null
 
-mlr --opprint join --ul -f reg_test/input/joina.dkvp -l l -r r -j o /dev/null
+mlr --opprint join --ul -f ./reg_test/input/joina.dkvp -l l -r r -j o /dev/null
 l x
 1 a
 2 b
@@ -1178,7 +1178,7 @@ l x
 3 f
 4 g
 
-mlr --opprint join -u --ul -f reg_test/input/joina.dkvp -l l -r r -j o /dev/null
+mlr --opprint join -u --ul -f ./reg_test/input/joina.dkvp -l l -r r -j o /dev/null
 l x
 1 a
 2 b
@@ -1188,11 +1188,11 @@ l x
 3 f
 4 g
 
-mlr --opprint join --ur -f reg_test/input/joina.dkvp -l l -r r -j o /dev/null
+mlr --opprint join --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o /dev/null
 
-mlr --opprint join -u --ur -f reg_test/input/joina.dkvp -l l -r r -j o /dev/null
+mlr --opprint join -u --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o /dev/null
 
-mlr --opprint join --ul --ur -f reg_test/input/joina.dkvp -l l -r r -j o /dev/null
+mlr --opprint join --ul --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o /dev/null
 l x
 1 a
 2 b
@@ -1202,7 +1202,7 @@ l x
 3 f
 4 g
 
-mlr --opprint join -u --ul --ur -f reg_test/input/joina.dkvp -l l -r r -j o /dev/null
+mlr --opprint join -u --ul --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o /dev/null
 l x
 1 a
 2 b
@@ -1212,7 +1212,7 @@ l x
 3 f
 4 g
 
-mlr --opprint join --np --ul -f reg_test/input/joina.dkvp -l l -r r -j o /dev/null
+mlr --opprint join --np --ul -f ./reg_test/input/joina.dkvp -l l -r r -j o /dev/null
 l x
 1 a
 2 b
@@ -1222,7 +1222,7 @@ l x
 3 f
 4 g
 
-mlr --opprint join -u --np --ul -f reg_test/input/joina.dkvp -l l -r r -j o /dev/null
+mlr --opprint join -u --np --ul -f ./reg_test/input/joina.dkvp -l l -r r -j o /dev/null
 l x
 1 a
 2 b
@@ -1232,11 +1232,11 @@ l x
 3 f
 4 g
 
-mlr --opprint join --np --ur -f reg_test/input/joina.dkvp -l l -r r -j o /dev/null
+mlr --opprint join --np --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o /dev/null
 
-mlr --opprint join -u --np --ur -f reg_test/input/joina.dkvp -l l -r r -j o /dev/null
+mlr --opprint join -u --np --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o /dev/null
 
-mlr --opprint join --np --ul --ur -f reg_test/input/joina.dkvp -l l -r r -j o /dev/null
+mlr --opprint join --np --ul --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o /dev/null
 l x
 1 a
 2 b
@@ -1246,7 +1246,7 @@ l x
 3 f
 4 g
 
-mlr --opprint join -u --np --ul --ur -f reg_test/input/joina.dkvp -l l -r r -j o /dev/null
+mlr --opprint join -u --np --ul --ur -f ./reg_test/input/joina.dkvp -l l -r r -j o /dev/null
 l x
 1 a
 2 b
@@ -1256,7 +1256,7 @@ l x
 3 f
 4 g
 
-mlr --odkvp join -u -j a -f reg_test/input/join-het.dkvp reg_test/input/abixy-het
+mlr --odkvp join -u -j a -f ./reg_test/input/join-het.dkvp ./reg_test/input/abixy-het
 a=pan,n=234,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,n=123,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=eks,n=123,bbb=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
@@ -1266,7 +1266,7 @@ a=eks,n=123,b=zee,iii=7,x=0.6117840605678454,y=0.1878849191181694
 a=zee,n=456,b=wye,i=8,x=0.5985540091064224,yyy=0.976181385699006
 a=pan,n=234,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr --odkvp join -u -j a -f reg_test/input/abixy-het reg_test/input/join-het.dkvp
+mlr --odkvp join -u -j a -f ./reg_test/input/abixy-het ./reg_test/input/join-het.dkvp
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797,n=123
 a=eks,bbb=wye,i=4,x=0.38139939387114097,y=0.13418874328430463,n=123
 a=eks,b=zee,iii=7,x=0.6117840605678454,y=0.1878849191181694,n=123
@@ -1276,119 +1276,119 @@ a=wye,b=pan,i=5,xxx=0.5732889198020006,y=0.8636244699032729,n=345
 a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697,n=456
 a=zee,b=wye,i=8,x=0.5985540091064224,yyy=0.976181385699006,n=456
 
-mlr --odkvp join -u --np --ul --ur -j a -f reg_test/input/join-het.dkvp reg_test/input/abixy-het
+mlr --odkvp join -u --np --ul --ur -j a -f ./reg_test/input/join-het.dkvp ./reg_test/input/abixy-het
 aaa=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 aaa=hat,bbb=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 aye=bee,enn=emm
 
-mlr --odkvp join -u --np --ul --ur -j a -f reg_test/input/abixy-het reg_test/input/join-het.dkvp
+mlr --odkvp join -u --np --ul --ur -j a -f ./reg_test/input/abixy-het ./reg_test/input/join-het.dkvp
 aye=bee,enn=emm
 aaa=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 aaa=hat,bbb=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r1
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r1
 j=1,b=11
 j=1,b=12
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r11
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r11
 j=1,b=11
 j=1,b=12
 j=1,b=11
 j=1,b=12
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r12
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r12
 j=1,b=11
 j=1,b=12
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r13
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r13
 j=1,b=11
 j=1,b=12
 j=3,b=14
 j=3,b=15
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r14
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r14
 j=1,b=11
 j=1,b=12
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r15
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r15
 j=1,b=11
 j=1,b=12
 j=5,b=17
 j=5,b=18
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r16
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r16
 j=1,b=11
 j=1,b=12
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r2
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r2
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r22
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r22
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r23
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r23
 j=3,b=14
 j=3,b=15
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r24
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r24
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r25
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r25
 j=5,b=17
 j=5,b=18
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r26
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r26
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r3
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r3
 j=3,b=14
 j=3,b=15
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r33
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r33
 j=3,b=14
 j=3,b=15
 j=3,b=14
 j=3,b=15
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r34
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r34
 j=3,b=14
 j=3,b=15
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r35
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r35
 j=3,b=14
 j=3,b=15
 j=5,b=17
 j=5,b=18
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r36
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r36
 j=3,b=14
 j=3,b=15
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r4
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r4
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r44
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r44
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r45
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r45
 j=5,b=17
 j=5,b=18
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r46
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r46
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r5
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r5
 j=5,b=17
 j=5,b=18
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r55
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r55
 j=5,b=17
 j=5,b=18
 j=5,b=17
 j=5,b=18
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r56
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r56
 j=5,b=17
 j=5,b=18
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r6
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r6
 
-mlr join -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r66
+mlr join -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r66
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r1
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r1
 x=100,b=10
 x=200,b=13
 l=3,b=14
@@ -1398,7 +1398,7 @@ l=5,b=17
 l=5,b=18
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r11
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r11
 x=100,b=10
 x=200,b=13
 l=3,b=14
@@ -1408,7 +1408,7 @@ l=5,b=17
 l=5,b=18
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r12
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r12
 x=100,b=10
 x=200,b=13
 x=300,b=16
@@ -1418,7 +1418,7 @@ l=5,b=17
 l=5,b=18
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r13
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r13
 x=100,b=10
 x=200,b=13
 x=300,b=16
@@ -1426,7 +1426,7 @@ l=5,b=17
 l=5,b=18
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r14
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r14
 x=100,b=10
 x=200,b=13
 l=3,b=14
@@ -1436,7 +1436,7 @@ x=400,b=19
 l=5,b=17
 l=5,b=18
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r15
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r15
 x=100,b=10
 x=200,b=13
 l=3,b=14
@@ -1444,7 +1444,7 @@ l=3,b=15
 x=300,b=16
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r16
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r16
 x=100,b=10
 x=200,b=13
 l=3,b=14
@@ -1454,7 +1454,7 @@ l=5,b=17
 l=5,b=18
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r2
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r2
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1466,7 +1466,7 @@ l=5,b=17
 l=5,b=18
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r22
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r22
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1478,7 +1478,7 @@ l=5,b=17
 l=5,b=18
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r23
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r23
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1488,7 +1488,7 @@ l=5,b=17
 l=5,b=18
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r24
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r24
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1500,7 +1500,7 @@ x=400,b=19
 l=5,b=17
 l=5,b=18
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r25
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r25
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1510,7 +1510,7 @@ l=3,b=14
 l=3,b=15
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r26
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r26
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1522,7 +1522,7 @@ l=5,b=17
 l=5,b=18
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r3
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r3
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1532,7 +1532,7 @@ l=5,b=17
 l=5,b=18
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r33
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r33
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1542,7 +1542,7 @@ l=5,b=17
 l=5,b=18
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r34
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r34
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1552,7 +1552,7 @@ x=400,b=19
 l=5,b=17
 l=5,b=18
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r35
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r35
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1560,7 +1560,7 @@ l=1,b=12
 x=300,b=16
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r36
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r36
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1570,7 +1570,7 @@ l=5,b=17
 l=5,b=18
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r4
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r4
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1582,7 +1582,7 @@ x=400,b=19
 l=5,b=17
 l=5,b=18
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r44
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r44
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1594,7 +1594,7 @@ x=400,b=19
 l=5,b=17
 l=5,b=18
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r45
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r45
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1604,7 +1604,7 @@ l=3,b=15
 x=300,b=16
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r46
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r46
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1616,7 +1616,7 @@ x=400,b=19
 l=5,b=17
 l=5,b=18
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r5
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r5
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1626,7 +1626,7 @@ l=3,b=15
 x=300,b=16
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r55
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r55
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1636,7 +1636,7 @@ l=3,b=15
 x=300,b=16
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r56
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r56
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1646,7 +1646,7 @@ l=3,b=15
 x=300,b=16
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r6
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r6
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1658,7 +1658,7 @@ l=5,b=17
 l=5,b=18
 x=400,b=19
 
-mlr join --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r66
+mlr join --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r66
 x=100,b=10
 x=200,b=13
 l=1,b=11
@@ -1670,262 +1670,262 @@ l=5,b=17
 l=5,b=18
 x=400,b=19
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r1
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r1
 y=111
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r11
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r11
 y=111
 y=222
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r12
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r12
 y=111
 y=222
 r=2
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r13
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r13
 y=111
 y=222
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r14
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r14
 y=111
 y=222
 r=4
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r15
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r15
 y=111
 y=222
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r16
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r16
 y=111
 y=222
 r=6
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r2
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r2
 y=111
 r=2
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r22
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r22
 y=111
 r=2
 y=222
 r=2
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r23
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r23
 y=111
 r=2
 y=222
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r24
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r24
 y=111
 r=2
 y=222
 r=4
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r25
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r25
 y=111
 r=2
 y=222
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r26
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r26
 y=111
 r=2
 y=222
 r=6
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r3
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r3
 y=111
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r33
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r33
 y=111
 y=222
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r34
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r34
 y=111
 y=222
 r=4
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r35
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r35
 y=111
 y=222
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r36
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r36
 y=111
 y=222
 r=6
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r4
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r4
 y=111
 r=4
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r44
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r44
 y=111
 r=4
 y=222
 r=4
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r45
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r45
 y=111
 r=4
 y=222
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r46
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r46
 y=111
 r=4
 y=222
 r=6
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r5
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r5
 y=111
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r55
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r55
 y=111
 y=222
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r56
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r56
 y=111
 y=222
 r=6
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r6
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r6
 y=111
 r=6
 y=333
 
-mlr join --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r66
+mlr join --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r66
 y=111
 r=6
 y=222
 r=6
 y=333
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r1
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r1
 j=1,b=11
 j=1,b=12
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r11
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r11
 j=1,b=11
 j=1,b=12
 j=1,b=11
 j=1,b=12
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r12
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r12
 j=1,b=11
 j=1,b=12
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r13
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r13
 j=1,b=11
 j=1,b=12
 j=3,b=14
 j=3,b=15
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r14
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r14
 j=1,b=11
 j=1,b=12
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r15
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r15
 j=1,b=11
 j=1,b=12
 j=5,b=17
 j=5,b=18
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r16
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r16
 j=1,b=11
 j=1,b=12
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r2
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r2
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r22
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r22
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r23
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r23
 j=3,b=14
 j=3,b=15
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r24
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r24
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r25
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r25
 j=5,b=17
 j=5,b=18
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r26
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r26
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r3
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r3
 j=3,b=14
 j=3,b=15
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r33
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r33
 j=3,b=14
 j=3,b=15
 j=3,b=14
 j=3,b=15
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r34
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r34
 j=3,b=14
 j=3,b=15
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r35
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r35
 j=3,b=14
 j=3,b=15
 j=5,b=17
 j=5,b=18
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r36
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r36
 j=3,b=14
 j=3,b=15
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r4
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r4
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r44
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r44
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r45
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r45
 j=5,b=17
 j=5,b=18
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r46
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r46
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r5
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r5
 j=5,b=17
 j=5,b=18
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r55
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r55
 j=5,b=17
 j=5,b=18
 j=5,b=17
 j=5,b=18
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r56
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r56
 j=5,b=17
 j=5,b=18
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r6
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r6
 
-mlr join -u -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r66
+mlr join -u -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r66
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r1
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r1
 l=3,b=14
 l=3,b=15
 l=5,b=17
@@ -1935,7 +1935,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r11
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r11
 l=3,b=14
 l=3,b=15
 l=5,b=17
@@ -1945,7 +1945,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r12
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r12
 l=3,b=14
 l=3,b=15
 l=5,b=17
@@ -1955,7 +1955,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r13
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r13
 l=5,b=17
 l=5,b=18
 x=100,b=10
@@ -1963,7 +1963,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r14
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r14
 l=3,b=14
 l=3,b=15
 l=5,b=17
@@ -1973,7 +1973,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r15
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r15
 l=3,b=14
 l=3,b=15
 x=100,b=10
@@ -1981,7 +1981,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r16
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r16
 l=3,b=14
 l=3,b=15
 l=5,b=17
@@ -1991,7 +1991,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r2
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r2
 l=1,b=11
 l=1,b=12
 l=3,b=14
@@ -2003,7 +2003,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r22
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r22
 l=1,b=11
 l=1,b=12
 l=3,b=14
@@ -2015,7 +2015,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r23
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r23
 l=1,b=11
 l=1,b=12
 l=5,b=17
@@ -2025,7 +2025,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r24
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r24
 l=1,b=11
 l=1,b=12
 l=3,b=14
@@ -2037,7 +2037,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r25
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r25
 l=1,b=11
 l=1,b=12
 l=3,b=14
@@ -2047,7 +2047,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r26
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r26
 l=1,b=11
 l=1,b=12
 l=3,b=14
@@ -2059,7 +2059,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r3
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r3
 l=1,b=11
 l=1,b=12
 l=5,b=17
@@ -2069,7 +2069,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r33
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r33
 l=1,b=11
 l=1,b=12
 l=5,b=17
@@ -2079,7 +2079,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r34
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r34
 l=1,b=11
 l=1,b=12
 l=5,b=17
@@ -2089,7 +2089,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r35
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r35
 l=1,b=11
 l=1,b=12
 x=100,b=10
@@ -2097,7 +2097,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r36
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r36
 l=1,b=11
 l=1,b=12
 l=5,b=17
@@ -2107,7 +2107,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r4
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r4
 l=1,b=11
 l=1,b=12
 l=3,b=14
@@ -2119,7 +2119,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r44
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r44
 l=1,b=11
 l=1,b=12
 l=3,b=14
@@ -2131,7 +2131,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r45
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r45
 l=1,b=11
 l=1,b=12
 l=3,b=14
@@ -2141,7 +2141,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r46
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r46
 l=1,b=11
 l=1,b=12
 l=3,b=14
@@ -2153,7 +2153,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r5
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r5
 l=1,b=11
 l=1,b=12
 l=3,b=14
@@ -2163,7 +2163,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r55
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r55
 l=1,b=11
 l=1,b=12
 l=3,b=14
@@ -2173,7 +2173,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r56
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r56
 l=1,b=11
 l=1,b=12
 l=3,b=14
@@ -2183,7 +2183,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r6
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r6
 l=1,b=11
 l=1,b=12
 l=3,b=14
@@ -2195,7 +2195,7 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ul -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r66
+mlr join -u --np --ul -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r66
 l=1,b=11
 l=1,b=12
 l=3,b=14
@@ -2207,153 +2207,153 @@ x=200,b=13
 x=300,b=16
 x=400,b=19
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r1
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r1
 y=111
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r11
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r11
 y=111
 y=222
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r12
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r12
 y=111
 y=222
 r=2
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r13
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r13
 y=111
 y=222
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r14
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r14
 y=111
 y=222
 r=4
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r15
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r15
 y=111
 y=222
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r16
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r16
 y=111
 y=222
 r=6
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r2
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r2
 y=111
 r=2
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r22
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r22
 y=111
 r=2
 y=222
 r=2
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r23
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r23
 y=111
 r=2
 y=222
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r24
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r24
 y=111
 r=2
 y=222
 r=4
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r25
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r25
 y=111
 r=2
 y=222
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r26
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r26
 y=111
 r=2
 y=222
 r=6
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r3
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r3
 y=111
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r33
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r33
 y=111
 y=222
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r34
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r34
 y=111
 y=222
 r=4
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r35
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r35
 y=111
 y=222
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r36
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r36
 y=111
 y=222
 r=6
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r4
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r4
 y=111
 r=4
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r44
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r44
 y=111
 r=4
 y=222
 r=4
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r45
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r45
 y=111
 r=4
 y=222
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r46
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r46
 y=111
 r=4
 y=222
 r=6
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r5
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r5
 y=111
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r55
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r55
 y=111
 y=222
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r56
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r56
 y=111
 y=222
 r=6
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r6
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r6
 y=111
 r=6
 y=333
 
-mlr join -u --np --ur -l l -r r -j j -f reg_test/input/het-join-left reg_test/input/het-join-right-r66
+mlr join -u --np --ur -l l -r r -j j -f ./reg_test/input/het-join-left ./reg_test/input/het-join-right-r66
 y=111
 r=6
 y=222
@@ -2364,19 +2364,19 @@ y=333
 ================================================================
 STATS
 
-mlr --opprint stats1 -a mean,sum,count,min,max,mode -f i,x,y reg_test/input/abixy
+mlr --opprint stats1 -a mean,sum,count,min,max,mode -f i,x,y ./reg_test/input/abixy
 i_mean   i_sum i_count i_min i_max i_mode x_mean   x_sum    x_count x_min    x_max    x_mode             y_mean   y_sum    y_count y_min    y_max    y_mode
 5.500000 55    10      1     1     1      0.453629 4.536294 10      0.031442 0.031442 0.3467901443380824 0.594454 5.944542 10      0.134189 0.134189 0.7268028627434533
 
-mlr --opprint stats1 -a min,p10,p50,mode,p90,max -f i,x,y reg_test/input/abixy
+mlr --opprint stats1 -a min,p10,p50,mode,p90,max -f i,x,y ./reg_test/input/abixy
 i_min i_p10    i_p50    i_mode i_p90     i_max x_min    x_p10    x_p50    x_mode             x_p90    x_max    y_min    y_p10    y_p50    y_mode             y_p90    y_max
 1     2.000000 6.000000 1      10.000000 1     0.031442 0.204603 0.527126 0.3467901443380824 0.758680 0.031442 0.134189 0.187885 0.726803 0.7268028627434533 0.976181 0.134189
 
-mlr --opprint stats1 -a mean,meaneb,stddev -f i,x,y reg_test/input/abixy
+mlr --opprint stats1 -a mean,meaneb,stddev -f i,x,y ./reg_test/input/abixy
 i_mean   i_meaneb i_stddev x_mean   x_meaneb x_stddev y_mean   y_meaneb y_stddev
 5.500000 0.957427 3.027650 0.453629 0.068157 0.215531 0.594454 0.096968 0.306639
 
-mlr --oxtab stats1 -s -a mean,sum,count,min,max,mode -f i,x,y reg_test/input/abixy
+mlr --oxtab stats1 -s -a mean,sum,count,min,max,mode -f i,x,y ./reg_test/input/abixy
 a       pan
 b       pan
 i       1
@@ -2617,7 +2617,7 @@ y_min   0.134189
 y_max   0.134189
 y_mode  0.7268028627434533
 
-mlr --opprint stats1 -a mean,sum,count,min,max,mode -f i,x,y -g a reg_test/input/abixy
+mlr --opprint stats1 -a mean,sum,count,min,max,mode -f i,x,y -g a ./reg_test/input/abixy
 a   i_mean   i_sum i_count i_min i_max i_mode x_mean   x_sum    x_count x_min    x_max    x_mode              y_mean   y_sum    y_count y_min    y_max    y_mode
 pan 5.500000 11    2       1     1     1      0.424708 0.849416 2       0.346790 0.346790 0.3467901443380824  0.839711 1.679421 2       0.726803 0.726803 0.7268028627434533
 eks 4.333333 13    3       2     2     2      0.583954 1.751863 3       0.381399 0.381399 0.7586799647899636  0.281408 0.844225 3       0.134189 0.134189 0.5221511083334797
@@ -2625,7 +2625,7 @@ wye 4.000000 8     2       3     3     3      0.388946 0.777892 2       0.204603
 zee 7.000000 14    2       6     6     6      0.562840 1.125680 2       0.527126 0.527126 0.5271261600918548  0.734701 1.469403 2       0.493221 0.493221 0.49322128674835697
 hat 9.000000 9     1       9     9     9      0.031442 0.031442 1       0.031442 0.031442 0.03144187646093577 0.749551 0.749551 1       0.749551 0.749551 0.7495507603507059
 
-mlr --opprint stats1 -a min,p10,p50,mode,p90,max -f i,x,y -g a reg_test/input/abixy
+mlr --opprint stats1 -a min,p10,p50,mode,p90,max -f i,x,y -g a ./reg_test/input/abixy
 a   i_min i_p10    i_p50     i_mode i_p90     i_max x_min    x_p10    x_p50    x_mode              x_p90    x_max    y_min    y_p10    y_p50    y_mode              y_p90    y_max
 pan 1     1.000000 10.000000 1      10.000000 1     0.346790 0.346790 0.502626 0.3467901443380824  0.502626 0.346790 0.726803 0.726803 0.952618 0.7268028627434533  0.952618 0.726803
 eks 2     2.000000 4.000000  2      7.000000  2     0.381399 0.381399 0.611784 0.7586799647899636  0.758680 0.381399 0.134189 0.134189 0.187885 0.5221511083334797  0.522151 0.134189
@@ -2633,7 +2633,7 @@ wye 3     3.000000 5.000000  3      5.000000  3     0.204603 0.204603 0.573289 0
 zee 6     6.000000 8.000000  6      8.000000  6     0.527126 0.527126 0.598554 0.5271261600918548  0.598554 0.527126 0.493221 0.493221 0.976181 0.49322128674835697 0.976181 0.493221
 hat 9     9.000000 9.000000  9      9.000000  9     0.031442 0.031442 0.031442 0.03144187646093577 0.031442 0.031442 0.749551 0.749551 0.749551 0.7495507603507059  0.749551 0.749551
 
-mlr --opprint stats1 -a mean,meaneb,stddev -f i,x,y -g a reg_test/input/abixy
+mlr --opprint stats1 -a mean,meaneb,stddev -f i,x,y -g a ./reg_test/input/abixy
 a   i_mean   i_meaneb i_stddev x_mean   x_meaneb x_stddev y_mean   y_meaneb y_stddev
 pan 5.500000 4.500000 6.363961 0.424708 0.077918 0.110193 0.839711 0.112908 0.159676
 eks 4.333333 1.452966 2.516611 0.583954 0.109797 0.190174 0.281408 0.121365 0.210211
@@ -2641,7 +2641,7 @@ wye 4.000000 1.000000 1.414214 0.388946 0.184343 0.260700 0.600971 0.262653 0.37
 zee 7.000000 1.000000 1.414214 0.562840 0.035714 0.050507 0.734701 0.241480 0.341504
 hat 9.000000 -        -        0.031442 -        -        0.749551 -        -
 
-mlr --oxtab stats1 -s -a mean,sum,count,min,max,mode -f i,x,y -g a reg_test/input/abixy
+mlr --oxtab stats1 -s -a mean,sum,count,min,max,mode -f i,x,y -g a ./reg_test/input/abixy
 a       pan
 b       pan
 i       1
@@ -2882,7 +2882,7 @@ y_min   0.726803
 y_max   0.726803
 y_mode  0.7268028627434533
 
-mlr --opprint stats1 -a mean,sum,count,min,max,mode -f i,x,y -g a,b reg_test/input/abixy
+mlr --opprint stats1 -a mean,sum,count,min,max,mode -f i,x,y -g a,b ./reg_test/input/abixy
 a   b   i_mean    i_sum i_count i_min i_max i_mode x_mean   x_sum    x_count x_min    x_max    x_mode              y_mean   y_sum    y_count y_min    y_max    y_mode
 pan pan 1.000000  1     1       1     1     1      0.346790 0.346790 1       0.346790 0.346790 0.3467901443380824  0.726803 0.726803 1       0.726803 0.726803 0.7268028627434533
 eks pan 2.000000  2     1       2     2     2      0.758680 0.758680 1       0.758680 0.758680 0.7586799647899636  0.522151 0.522151 1       0.522151 0.522151 0.5221511083334797
@@ -2895,7 +2895,7 @@ zee wye 8.000000  8     1       8     8     8      0.598554 0.598554 1       0.5
 hat wye 9.000000  9     1       9     9     9      0.031442 0.031442 1       0.031442 0.031442 0.03144187646093577 0.749551 0.749551 1       0.749551 0.749551 0.7495507603507059
 pan wye 10.000000 10    1       10    10    10     0.502626 0.502626 1       0.502626 0.502626 0.5026260055412137  0.952618 0.952618 1       0.952618 0.952618 0.9526183602969864
 
-mlr --opprint stats1 -a min,p10,p50,mode,p90,max -f i,x,y -g a,b reg_test/input/abixy
+mlr --opprint stats1 -a min,p10,p50,mode,p90,max -f i,x,y -g a,b ./reg_test/input/abixy
 a   b   i_min i_p10     i_p50     i_mode i_p90     i_max x_min    x_p10    x_p50    x_mode              x_p90    x_max    y_min    y_p10    y_p50    y_mode              y_p90    y_max
 pan pan 1     1.000000  1.000000  1      1.000000  1     0.346790 0.346790 0.346790 0.3467901443380824  0.346790 0.346790 0.726803 0.726803 0.726803 0.7268028627434533  0.726803 0.726803
 eks pan 2     2.000000  2.000000  2      2.000000  2     0.758680 0.758680 0.758680 0.7586799647899636  0.758680 0.758680 0.522151 0.522151 0.522151 0.5221511083334797  0.522151 0.522151
@@ -2908,7 +2908,7 @@ zee wye 8     8.000000  8.000000  8      8.000000  8     0.598554 0.598554 0.598
 hat wye 9     9.000000  9.000000  9      9.000000  9     0.031442 0.031442 0.031442 0.03144187646093577 0.031442 0.031442 0.749551 0.749551 0.749551 0.7495507603507059  0.749551 0.749551
 pan wye 10    10.000000 10.000000 10     10.000000 10    0.502626 0.502626 0.502626 0.5026260055412137  0.502626 0.502626 0.952618 0.952618 0.952618 0.9526183602969864  0.952618 0.952618
 
-mlr --opprint stats1 -a mean,meaneb,stddev -f i,x,y -g a,b reg_test/input/abixy
+mlr --opprint stats1 -a mean,meaneb,stddev -f i,x,y -g a,b ./reg_test/input/abixy
 a   b   i_mean    i_meaneb i_stddev x_mean   x_meaneb x_stddev y_mean   y_meaneb y_stddev
 pan pan 1.000000  -        -        0.346790 -        -        0.726803 -        -
 eks pan 2.000000  -        -        0.758680 -        -        0.522151 -        -
@@ -2921,7 +2921,7 @@ zee wye 8.000000  -        -        0.598554 -        -        0.976181 -
 hat wye 9.000000  -        -        0.031442 -        -        0.749551 -        -
 pan wye 10.000000 -        -        0.502626 -        -        0.952618 -        -
 
-mlr --oxtab stats1 -s -a mean,sum,count,min,max,mode -f i,x,y -g a,b reg_test/input/abixy
+mlr --oxtab stats1 -s -a mean,sum,count,min,max,mode -f i,x,y -g a,b ./reg_test/input/abixy
 a       pan
 b       pan
 i       1
@@ -3162,10 +3162,10 @@ y_min   0.952618
 y_max   0.952618
 y_mode  0.9526183602969864
 
-mlr --oxtab stats1 -a mean -f x reg_test/input/abixy-het
+mlr --oxtab stats1 -a mean -f x ./reg_test/input/abixy-het
 x_mean 0.440334
 
-mlr --oxtab stats1 -a mean -f x -g a reg_test/input/abixy-het
+mlr --oxtab stats1 -a mean -f x -g a ./reg_test/input/abixy-het
 a      pan
 x_mean 0.424708
 
@@ -3178,11 +3178,11 @@ x_mean
 a      zee
 x_mean 0.562840
 
-mlr --opprint stats2 -a linreg-ols,linreg-pca,r2,corr,cov -f x,y,xy,y2,x2,x2 reg_test/input/abixy-wide
+mlr --opprint stats2 -a linreg-ols,linreg-pca,r2,corr,cov -f x,y,xy,y2,x2,x2 ./reg_test/input/abixy-wide
 x_y_ols_m x_y_ols_b x_y_ols_n x_y_pca_m x_y_pca_b x_y_pca_n x_y_pca_quality x_y_r2   x_y_corr x_y_cov  xy_y2_ols_m xy_y2_ols_b xy_y2_ols_n xy_y2_pca_m xy_y2_pca_b xy_y2_pca_n xy_y2_pca_quality xy_y2_r2 xy_y2_corr xy_y2_cov x2_x2_ols_m x2_x2_ols_b x2_x2_ols_n x2_x2_pca_m x2_x2_pca_b x2_x2_pca_n x2_x2_pca_quality x2_x2_r2 x2_x2_corr x2_x2_cov
 0.028351  0.487644  2000      1.332924  -0.170590 2000      0.056909        0.000791 0.028120 0.002330 0.893610    0.107060    2000        1.529534    -0.055477   2000        0.824336          0.447971 0.669306   0.045036  1.000000    0.000000    2000        1.000000    0.000000    2000        1.000000          1.000000 1.000000   0.087709
 
-mlr --opprint stats2 -a linreg-ols,linreg-pca,r2,corr,cov -f x,y,xy,y2,x2,x2 -g a,b reg_test/input/abixy-wide
+mlr --opprint stats2 -a linreg-ols,linreg-pca,r2,corr,cov -f x,y,xy,y2,x2,x2 -g a,b ./reg_test/input/abixy-wide
 a   b   x_y_ols_m x_y_ols_b x_y_ols_n x_y_pca_m x_y_pca_b x_y_pca_n x_y_pca_quality x_y_r2   x_y_corr  x_y_cov   xy_y2_ols_m xy_y2_ols_b xy_y2_ols_n xy_y2_pca_m xy_y2_pca_b xy_y2_pca_n xy_y2_pca_quality xy_y2_r2 xy_y2_corr xy_y2_cov x2_x2_ols_m x2_x2_ols_b x2_x2_ols_n x2_x2_pca_m x2_x2_pca_b x2_x2_pca_n x2_x2_pca_quality x2_x2_r2 x2_x2_corr x2_x2_cov
 cat pan 0.054420  0.481777  89        3.636062  -1.221602 89        0.177683        0.002504 0.050036  0.003777  0.950908    0.105754    89          1.715574    -0.081719   89          0.830612          0.435336 0.659800   0.041616  1.000000    0.000000    89          1.000000    0.000000    89          1.000000          1.000000 1.000000   0.066303
 pan wye -0.145486 0.584799  78        -1.340927 1.199920  78        0.254025        0.019479 -0.139568 -0.012683 0.908151    0.126628    78          1.595150    -0.045034   78          0.824114          0.438850 0.662457   0.046203  1.000000    0.000000    78          1.000000    0.000000    78          1.000000          1.000000 1.000000   0.093192
@@ -3210,7 +3210,7 @@ cat cat 0.016257  0.425410  79        0.432946  0.225535  79        0.044275
 pan cat -0.188523 0.616919  89        -0.898665 0.953923  89        0.324264        0.037036 -0.192447 -0.016206 0.781770    0.176617    89          2.020454    -0.113587   89          0.762332          0.278739 0.527958   0.032984  1.000000    0.000000    89          1.000000    0.000000    89          1.000000          1.000000 1.000000   0.093193
 wye pan 0.229443  0.444446  66        1.313689  -0.098124 66        0.365811        0.046722 0.216152  0.020367  0.887659    0.145052    66          1.471906    -0.030176   66          0.827911          0.462545 0.680107   0.064496  1.000000    0.000000    66          1.000000    0.000000    66          1.000000          1.000000 1.000000   0.103497
 
-mlr --oxtab stats2 -s -a linreg-ols,linreg-pca,r2,corr,cov -f x,y,xy,y2,x2,x2 reg_test/input/abixy-wide-short
+mlr --oxtab stats2 -s -a linreg-ols,linreg-pca,r2,corr,cov -f x,y,xy,y2,x2,x2 ./reg_test/input/abixy-wide-short
 a                 cat
 b                 pan
 i                 1
@@ -3991,7 +3991,7 @@ x2_x2_r2          1.000000
 x2_x2_corr        1.000000
 x2_x2_cov         0.038221
 
-mlr --oxtab stats2 -s -a linreg-ols,linreg-pca,r2,corr,cov -f x,y,xy,y2,x2,x2 -g a,b reg_test/input/abixy-wide-short
+mlr --oxtab stats2 -s -a linreg-ols,linreg-pca,r2,corr,cov -f x,y,xy,y2,x2,x2 -g a,b ./reg_test/input/abixy-wide-short
 a                 cat
 b                 pan
 i                 1
@@ -4772,7 +4772,7 @@ x2_x2_r2          1.000000
 x2_x2_corr        1.000000
 x2_x2_cov         0.018440
 
-mlr --opprint stats2 --fit -a linreg-ols,linreg-pca -f x,y,xy,y2,x2,x2 reg_test/input/abixy-wide-short
+mlr --opprint stats2 --fit -a linreg-ols,linreg-pca -f x,y,xy,y2,x2,x2 ./reg_test/input/abixy-wide-short
 a   b   i  x                    y                   x2                    xy                   y2                   x_y_ols_fit x_y_pca_fit xy_y2_ols_fit xy_y2_pca_fit x2_x2_ols_fit x2_x2_pca_fit
 cat pan 1  0.5117389009583777   0.08295224980036853 0.2618767027540883    0.0424498931448654   0.006881075746942741 0.464963    0.366904    0.118531      -0.042629     0.261877      0.261877
 pan wye 2  0.5225940442098578   0.511678736087022   0.27310453504361476   0.2674002600279053   0.26181512896361225  0.459005    0.342466    0.417581      0.483270      0.273105      0.273105
@@ -4795,7 +4795,7 @@ wye wye 18 0.6770613653962891   0.896307226056897   0.4584120925122874    0.6068
 dog wye 19 0.4865373244199632   0.44117766146315884 0.23671856805373653   0.2146493990021416   0.1946377289741016   0.478796    0.423641    0.347454      0.359947      0.236719      0.236719
 dog dog 20 0.3223311725542929   0.08115611029827985 0.10389738480022534   0.026159144192390068 0.006586314238746564 0.568925    0.793322    0.096874      -0.080714     0.103897      0.103897
 
-mlr --opprint stats2 --fit -a linreg-ols,linreg-pca -f x,y,xy,y2,x2,x2 -g a reg_test/input/abixy-wide-short
+mlr --opprint stats2 --fit -a linreg-ols,linreg-pca -f x,y,xy,y2,x2,x2 -g a ./reg_test/input/abixy-wide-short
 a   b   i  x                    y                   x2                    xy                   y2                   x_y_ols_fit x_y_pca_fit xy_y2_ols_fit xy_y2_pca_fit x2_x2_ols_fit x2_x2_pca_fit
 cat pan 1  0.5117389009583777   0.08295224980036853 0.2618767027540883    0.0424498931448654   0.006881075746942741 0.082952    0.082952    0.006881      0.006881      0.261877      0.261877
 cat hat 12 0.6335445699880142   0.15467178563525052 0.4013787221612979    0.0979914699195631   0.02392336127159689  0.154672    0.154672    0.023923      0.023923      0.401379      0.401379
@@ -4818,19 +4818,19 @@ dog dog 20 0.3223311725542929   0.08115611029827985 0.10389738480022534   0.0261
 hat hat 9  0.33786884067769307  0.6036735617015514  0.11415535350088835   0.203962486439877    0.3644217690974368   0.603674    0.603674    0.364422      0.364422      0.114155      0.114155
 hat wye 13 0.35922068401384877  0.8502678133887914  0.1290394998233774    0.30543378552048117  0.7229553544849566   0.850268    0.850268    0.722955      0.722955      0.129039      0.129039
 
-mlr --opprint stats2 -a logireg -f x,y reg_test/input/logi.dkvp
+mlr --opprint stats2 -a logireg -f x,y ./reg_test/input/logi.dkvp
 x_y_logistic_m x_y_logistic_b x_y_logistic_n
 0.145457       0.145449       22
 
-mlr --opprint stats2 -a logireg -f x,y -g g reg_test/input/logi.dkvp
+mlr --opprint stats2 -a logireg -f x,y -g g ./reg_test/input/logi.dkvp
 g    x_y_logistic_m x_y_logistic_b x_y_logistic_n
 red  0.145458       -0.036371      11
 blue 0.145457       0.327269       11
 
-mlr --oxtab stats2 -a cov -f x,y reg_test/input/abixy-het
+mlr --oxtab stats2 -a cov -f x,y ./reg_test/input/abixy-het
 x_y_cov -0.011481
 
-mlr --oxtab stats2 -a cov -f x,y -g a reg_test/input/abixy-het
+mlr --oxtab stats2 -a cov -f x,y -g a ./reg_test/input/abixy-het
 a       pan
 x_y_cov 0.017595
 
@@ -4843,7 +4843,7 @@ x_y_cov
 a       zee
 x_y_cov 
 
-mlr --opprint step -a rsum,delta,counter -f x,y reg_test/input/abixy
+mlr --opprint step -a rsum,delta,counter -f x,y ./reg_test/input/abixy
 a   b   i  x                   y                   x_rsum   x_delta   x_counter y_rsum   y_delta   y_counter
 pan pan 1  0.3467901443380824  0.7268028627434533  0.346790 0         1         0.726803 0         1
 eks pan 2  0.7586799647899636  0.5221511083334797  1.105470 0.411890  2         1.248954 -0.204652 2
@@ -4856,7 +4856,7 @@ zee wye 8  0.5985540091064224  0.976181385699006   4.002226 -0.013230 8
 hat wye 9  0.03144187646093577 0.7495507603507059  4.033668 -0.567112 9         4.991924 -0.226631 9
 pan wye 10 0.5026260055412137  0.9526183602969864  4.536294 0.471184  10        5.944542 0.203068  10
 
-mlr --opprint step -a rsum,delta,counter -f x,y -g a reg_test/input/abixy
+mlr --opprint step -a rsum,delta,counter -f x,y -g a ./reg_test/input/abixy
 a   b   i  x                   y                   x_rsum   x_delta   x_counter y_rsum   y_delta   y_counter
 pan pan 1  0.3467901443380824  0.7268028627434533  0.346790 0         1         0.726803 0         1
 eks pan 2  0.7586799647899636  0.5221511083334797  0.758680 0         1         0.522151 0         1
@@ -4869,7 +4869,7 @@ zee wye 8  0.5985540091064224  0.976181385699006   1.125680 0.071428  2
 hat wye 9  0.03144187646093577 0.7495507603507059  0.031442 0         1         0.749551 0         1
 pan wye 10 0.5026260055412137  0.9526183602969864  0.849416 0.155836  2         1.679421 0.225815  2
 
-mlr --odkvp step -a rsum,delta,counter -f x,y reg_test/input/abixy-het
+mlr --odkvp step -a rsum,delta,counter -f x,y ./reg_test/input/abixy-het
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533,x_rsum=0.346790,x_delta=0,x_counter=1,y_rsum=0.726803,y_delta=0,y_counter=1
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797,x_rsum=1.105470,x_delta=0.411890,x_counter=2,y_rsum=1.248954,y_delta=-0.204652,y_counter=2
 aaa=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776,x_rsum=1.310073,x_delta=-0.554077,x_counter=3,y_rsum=1.587272,y_delta=-0.183833,y_counter=3
@@ -4881,7 +4881,7 @@ a=zee,b=wye,i=8,x=0.5985540091064224,yyy=0.976181385699006,x_rsum=3.428937,x_del
 aaa=hat,bbb=wye,i=9,x=0.03144187646093577,y=0.7495507603507059,x_rsum=3.460379,x_delta=-0.567112,x_counter=8,y_rsum=4.015743,y_delta=0.561666,y_counter=8
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864,x_rsum=3.963005,x_delta=0.471184,x_counter=9,y_rsum=4.968361,y_delta=0.203068,y_counter=9
 
-mlr --odkvp step -a rsum,delta,counter -f x,y -g a reg_test/input/abixy-het
+mlr --odkvp step -a rsum,delta,counter -f x,y -g a ./reg_test/input/abixy-het
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533,x_rsum=0.346790,x_delta=0,x_counter=1,y_rsum=0.726803,y_delta=0,y_counter=1
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797,x_rsum=0.758680,x_delta=0,x_counter=1,y_rsum=0.522151,y_delta=0,y_counter=1
 aaa=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -4893,7 +4893,7 @@ a=zee,b=wye,i=8,x=0.5985540091064224,yyy=0.976181385699006,x_rsum=1.125680,x_del
 aaa=hat,bbb=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864,x_rsum=0.849416,x_delta=0.155836,x_counter=2,y_rsum=1.679421,y_delta=0.225815,y_counter=2
 
-mlr --opprint histogram -f x,y --lo 0 --hi 1 --nbins 20 reg_test/input/small
+mlr --opprint histogram -f x,y --lo 0 --hi 1 --nbins 20 ./reg_test/input/small
 bin_lo   bin_hi   x_count y_count
 0.000000 0.050000 1       0
 0.050000 0.100000 0       0
@@ -6776,7 +6776,7 @@ mlr filter -v      $a==1 && $b == 1 || $c == 1 /dev/null
 ================================================================
 DSL FUNCTIONAL TESTS
 
-mlr filter $x>.3 reg_test/input/abixy
+mlr filter $x>.3 ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=eks,b=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
@@ -6786,7 +6786,7 @@ a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr filter $x>0.3 reg_test/input/abixy
+mlr filter $x>0.3 ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=eks,b=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
@@ -6796,7 +6796,7 @@ a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr filter $x>0.3 && $y>0.3 reg_test/input/abixy
+mlr filter $x>0.3 && $y>0.3 ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=pan,i=5,x=0.5732889198020006,y=0.8636244699032729
@@ -6804,7 +6804,7 @@ a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr filter $x>0.3 || $y>0.3 reg_test/input/abixy
+mlr filter $x>0.3 || $y>0.3 ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -6816,29 +6816,29 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr filter NR>=4 && NR <= 7 reg_test/input/abixy
+mlr filter NR>=4 && NR <= 7 ./reg_test/input/abixy
 a=eks,b=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
 a=wye,b=pan,i=5,x=0.5732889198020006,y=0.8636244699032729
 a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 
-mlr filter -x $x>.3 reg_test/input/abixy
+mlr filter -x $x>.3 ./reg_test/input/abixy
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 
-mlr filter -x $x>0.3 reg_test/input/abixy
+mlr filter -x $x>0.3 ./reg_test/input/abixy
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 
-mlr filter -x $x>0.3 && $y>0.3 reg_test/input/abixy
+mlr filter -x $x>0.3 && $y>0.3 ./reg_test/input/abixy
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=eks,b=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
 a=eks,b=zee,i=7,x=0.6117840605678454,y=0.1878849191181694
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 
-mlr filter -x $x>0.3 || $y>0.3 reg_test/input/abixy
+mlr filter -x $x>0.3 || $y>0.3 ./reg_test/input/abixy
 
-mlr filter -x NR>=4 && NR <= 7 reg_test/input/abixy
+mlr filter -x NR>=4 && NR <= 7 ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
@@ -6846,9 +6846,9 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-mlr filter $nosuchfield>.3 reg_test/input/abixy
+mlr filter $nosuchfield>.3 ./reg_test/input/abixy
 
-mlr put $x2 = $x**2 reg_test/input/abixy
+mlr put $x2 = $x**2 ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533,x2=0.120263
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797,x2=0.575595
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776,x2=0.041863
@@ -6860,7 +6860,7 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006,x2=0.358267
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059,x2=0.000989
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864,x2=0.252633
 
-mlr put $z = -0.024*$x+0.13 reg_test/input/abixy
+mlr put $z = -0.024*$x+0.13 ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533,z=0.121677
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797,z=0.111792
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776,z=0.125090
@@ -6872,7 +6872,7 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006,z=0.115635
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059,z=0.129245
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864,z=0.117937
 
-mlr put $c = $a . $b reg_test/input/abixy
+mlr put $c = $a . $b ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533,c=panpan
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797,c=ekspan
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776,c=wyewye
@@ -6884,7 +6884,7 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006,c=zeewye
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059,c=hatwye
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864,c=panwye
 
-mlr put $ii = $i + $i reg_test/input/abixy
+mlr put $ii = $i + $i ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533,ii=2
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797,ii=4
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776,ii=6
@@ -6896,7 +6896,7 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006,ii=16
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059,ii=18
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864,ii=20
 
-mlr put $emptytest = $i + $nosuch reg_test/input/abixy
+mlr put $emptytest = $i + $nosuch ./reg_test/input/abixy
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533,emptytest=
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797,emptytest=
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776,emptytest=
@@ -6908,7 +6908,7 @@ a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006,emptytest=
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059,emptytest=
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864,emptytest=
 
-mlr --opprint put $nr=NR;$fnr=FNR;$nf=NF;$filenum=FILENUM reg_test/input/abixy reg_test/input/abixy
+mlr --opprint put $nr=NR;$fnr=FNR;$nf=NF;$filenum=FILENUM ./reg_test/input/abixy ./reg_test/input/abixy
 a   b   i  x                   y                   nr fnr nf filenum
 pan pan 1  0.3467901443380824  0.7268028627434533  1  1   7  1
 eks pan 2  0.7586799647899636  0.5221511083334797  2  2   7  1
@@ -6931,7 +6931,7 @@ zee wye 8  0.5985540091064224  0.976181385699006   18 8   7  2
 hat wye 9  0.03144187646093577 0.7495507603507059  19 9   7  2
 pan wye 10 0.5026260055412137  0.9526183602969864  20 10  7  2
 
-mlr --opprint put $y=madd($x,10,37) then put $z=msub($x,10,37) reg_test/input/modarith.dat
+mlr --opprint put $y=madd($x,10,37) then put $z=msub($x,10,37) ./reg_test/input/modarith.dat
 x   y  z
 -37 10 27
 -36 11 28
@@ -7045,7 +7045,7 @@ x   y  z
 72  8  25
 73  9  26
 
-mlr --opprint put $y=mexp($x,35,37) then put $z=mmul($x,$y,37) reg_test/input/modarith.dat
+mlr --opprint put $y=mexp($x,35,37) then put $z=mmul($x,$y,37) ./reg_test/input/modarith.dat
 x   y  z
 -37 0  0
 -36 1  1
@@ -7159,7 +7159,7 @@ x   y  z
 72  18 1
 73  36 1
 
-mlr put $z=min($x, $y) reg_test/input/minmax.dkvp
+mlr put $z=min($x, $y) ./reg_test/input/minmax.dkvp
 x=1,y=2,z=1
 x=1,y=,z=1
 x=,y=,z=
@@ -7169,7 +7169,7 @@ x=3,y=,z=3
 x=,y=,z=
 x=,y=2,z=2
 
-mlr put $z=max($x, $y) reg_test/input/minmax.dkvp
+mlr put $z=max($x, $y) ./reg_test/input/minmax.dkvp
 x=1,y=2,z=2
 x=1,y=,z=1
 x=,y=,z=
@@ -7183,47 +7183,47 @@ x=,y=2,z=2
 ================================================================
 DSL NULL/EMPTY HANDLING
 
-mlr put $z = $x + $y reg_test/input/null-vs-empty.dkvp
+mlr put $z = $x + $y ./reg_test/input/null-vs-empty.dkvp
 x=1,y=2,s=hello,z=3
 x=1,y=,s=,z=
 x=,y=,s=hurrah,z=
 
-mlr put $z = $y + $y reg_test/input/null-vs-empty.dkvp
+mlr put $z = $y + $y ./reg_test/input/null-vs-empty.dkvp
 x=1,y=2,s=hello,z=4
 x=1,y=,s=,z=
 x=,y=,s=hurrah,z=
 
-mlr put $z = $x + $nosuch reg_test/input/null-vs-empty.dkvp
+mlr put $z = $x + $nosuch ./reg_test/input/null-vs-empty.dkvp
 x=1,y=2,s=hello,z=
 x=1,y=,s=,z=
 x=,y=,s=hurrah,z=
 
-mlr put $t = sub($s,       "ell", "X") reg_test/input/null-vs-empty.dkvp
+mlr put $t = sub($s,       "ell", "X") ./reg_test/input/null-vs-empty.dkvp
 x=1,y=2,s=hello,t=hXo
 x=1,y=,s=,t=
 x=,y=,s=hurrah,t=hurrah
 
-mlr put $t = sub($s,       "ell", "") reg_test/input/null-vs-empty.dkvp
+mlr put $t = sub($s,       "ell", "") ./reg_test/input/null-vs-empty.dkvp
 x=1,y=2,s=hello,t=ho
 x=1,y=,s=,t=
 x=,y=,s=hurrah,t=hurrah
 
-mlr put $t = sub($nosuch,  "ell", "X") reg_test/input/null-vs-empty.dkvp
+mlr put $t = sub($nosuch,  "ell", "X") ./reg_test/input/null-vs-empty.dkvp
 x=1,y=2,s=hello,t=
 x=1,y=,s=,t=
 x=,y=,s=hurrah,t=
 
-mlr put $t = gsub($s,      "l",   "X") reg_test/input/null-vs-empty.dkvp
+mlr put $t = gsub($s,      "l",   "X") ./reg_test/input/null-vs-empty.dkvp
 x=1,y=2,s=hello,t=heXXo
 x=1,y=,s=,t=
 x=,y=,s=hurrah,t=hurrah
 
-mlr put $t = gsub($s,      "l",   "") reg_test/input/null-vs-empty.dkvp
+mlr put $t = gsub($s,      "l",   "") ./reg_test/input/null-vs-empty.dkvp
 x=1,y=2,s=hello,t=heo
 x=1,y=,s=,t=
 x=,y=,s=hurrah,t=hurrah
 
-mlr put $t = gsub($nosuch, "l",   "X") reg_test/input/null-vs-empty.dkvp
+mlr put $t = gsub($nosuch, "l",   "X") ./reg_test/input/null-vs-empty.dkvp
 x=1,y=2,s=hello,t=
 x=1,y=,s=,t=
 x=,y=,s=hurrah,t=
@@ -7232,7 +7232,7 @@ x=,y=,s=hurrah,t=
 ================================================================
 DSL TYPE-INFERENCE
 
-mlr --xtab put $y     = $pi1 + $pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put $y     = $pi1 + $pi2 ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7245,7 +7245,7 @@ pi2 76
 ni2 -76
 y   151
 
-mlr --xtab put -F $y     = $pi1 + $pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y     = $pi1 + $pi2 ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7258,7 +7258,7 @@ pi2 76
 ni2 -76
 y   151.000000
 
-mlr --xtab put -S $y     = $pi1 . $pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put -S $y     = $pi1 . $pi2 ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7271,7 +7271,7 @@ pi2 76
 ni2 -76
 y   7576
 
-mlr --xtab filter 999   != $pi1 + $pi2 reg_test/input/mixed-types.xtab
+mlr --xtab filter 999   != $pi1 + $pi2 ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7283,7 +7283,7 @@ zi  0
 pi2 76
 ni2 -76
 
-mlr --xtab filter -F 999   != $pi1 + $pi2 reg_test/input/mixed-types.xtab
+mlr --xtab filter -F 999   != $pi1 + $pi2 ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7295,7 +7295,7 @@ zi  0
 pi2 76
 ni2 -76
 
-mlr --xtab filter -S "999" != $pi1 . $pi2 reg_test/input/mixed-types.xtab
+mlr --xtab filter -S "999" != $pi1 . $pi2 ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7307,7 +7307,7 @@ zi  0
 pi2 76
 ni2 -76
 
-mlr --xtab put $y=abs($pf1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=abs($pf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7320,7 +7320,7 @@ pi2 76
 ni2 -76
 y   71.200000
 
-mlr --xtab put $y=abs($nf1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=abs($nf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7333,7 +7333,7 @@ pi2 76
 ni2 -76
 y   71.200000
 
-mlr --xtab put $y=abs($zf) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=abs($zf) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7346,7 +7346,7 @@ pi2 76
 ni2 -76
 y   0.000000
 
-mlr --xtab put $y=abs($pi1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=abs($pi1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7359,7 +7359,7 @@ pi2 76
 ni2 -76
 y   75
 
-mlr --xtab put $y=abs($ni1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=abs($ni1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7372,7 +7372,7 @@ pi2 76
 ni2 -76
 y   75
 
-mlr --xtab put $y=abs($zi) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=abs($zi) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7385,7 +7385,7 @@ pi2 76
 ni2 -76
 y   0
 
-mlr --xtab put -F $y=abs($pf1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=abs($pf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7398,7 +7398,7 @@ pi2 76
 ni2 -76
 y   71.200000
 
-mlr --xtab put -F $y=abs($nf1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=abs($nf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7411,7 +7411,7 @@ pi2 76
 ni2 -76
 y   71.200000
 
-mlr --xtab put -F $y=abs($zf) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=abs($zf) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7424,7 +7424,7 @@ pi2 76
 ni2 -76
 y   0.000000
 
-mlr --xtab put -F $y=abs($pi1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=abs($pi1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7437,7 +7437,7 @@ pi2 76
 ni2 -76
 y   75.000000
 
-mlr --xtab put -F $y=abs($ni1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=abs($ni1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7450,7 +7450,7 @@ pi2 76
 ni2 -76
 y   75.000000
 
-mlr --xtab put -F $y=abs($zi) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=abs($zi) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7463,7 +7463,7 @@ pi2 76
 ni2 -76
 y   0.000000
 
-mlr --xtab put $y=ceil($pf1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=ceil($pf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7476,7 +7476,7 @@ pi2 76
 ni2 -76
 y   72.000000
 
-mlr --xtab put $y=ceil($nf1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=ceil($nf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7489,7 +7489,7 @@ pi2 76
 ni2 -76
 y   -71.000000
 
-mlr --xtab put $y=ceil($zf) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=ceil($zf) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7502,7 +7502,7 @@ pi2 76
 ni2 -76
 y   0.000000
 
-mlr --xtab put $y=ceil($pi1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=ceil($pi1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7515,7 +7515,7 @@ pi2 76
 ni2 -76
 y   75
 
-mlr --xtab put $y=ceil($ni1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=ceil($ni1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7528,7 +7528,7 @@ pi2 76
 ni2 -76
 y   -75
 
-mlr --xtab put $y=ceil($zi) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=ceil($zi) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7541,7 +7541,7 @@ pi2 76
 ni2 -76
 y   0
 
-mlr --xtab put -F $y=floor($pf1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=floor($pf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7554,7 +7554,7 @@ pi2 76
 ni2 -76
 y   71.000000
 
-mlr --xtab put -F $y=floor($nf1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=floor($nf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7567,7 +7567,7 @@ pi2 76
 ni2 -76
 y   -72.000000
 
-mlr --xtab put -F $y=floor($zf) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=floor($zf) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7580,7 +7580,7 @@ pi2 76
 ni2 -76
 y   0.000000
 
-mlr --xtab put -F $y=floor($pi1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=floor($pi1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7593,7 +7593,7 @@ pi2 76
 ni2 -76
 y   75.000000
 
-mlr --xtab put -F $y=floor($ni1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=floor($ni1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7606,7 +7606,7 @@ pi2 76
 ni2 -76
 y   -75.000000
 
-mlr --xtab put -F $y=floor($zi) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=floor($zi) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7619,7 +7619,7 @@ pi2 76
 ni2 -76
 y   0.000000
 
-mlr --xtab put $y=round($pf1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=round($pf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7632,7 +7632,7 @@ pi2 76
 ni2 -76
 y   71.000000
 
-mlr --xtab put $y=round($nf1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=round($nf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7645,7 +7645,7 @@ pi2 76
 ni2 -76
 y   -71.000000
 
-mlr --xtab put $y=round($zf) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=round($zf) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7658,7 +7658,7 @@ pi2 76
 ni2 -76
 y   0.000000
 
-mlr --xtab put $y=round($pi1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=round($pi1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7671,7 +7671,7 @@ pi2 76
 ni2 -76
 y   75
 
-mlr --xtab put $y=round($ni1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=round($ni1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7684,7 +7684,7 @@ pi2 76
 ni2 -76
 y   -75
 
-mlr --xtab put $y=round($zi) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=round($zi) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7697,7 +7697,7 @@ pi2 76
 ni2 -76
 y   0
 
-mlr --xtab put -F $y=round($pf1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=round($pf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7710,7 +7710,7 @@ pi2 76
 ni2 -76
 y   71.000000
 
-mlr --xtab put -F $y=round($nf1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=round($nf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7723,7 +7723,7 @@ pi2 76
 ni2 -76
 y   -71.000000
 
-mlr --xtab put -F $y=round($zf) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=round($zf) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7736,7 +7736,7 @@ pi2 76
 ni2 -76
 y   0.000000
 
-mlr --xtab put -F $y=round($pi1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=round($pi1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7749,7 +7749,7 @@ pi2 76
 ni2 -76
 y   75.000000
 
-mlr --xtab put -F $y=round($ni1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=round($ni1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7762,7 +7762,7 @@ pi2 76
 ni2 -76
 y   -75.000000
 
-mlr --xtab put -F $y=round($zi) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=round($zi) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7775,7 +7775,7 @@ pi2 76
 ni2 -76
 y   0.000000
 
-mlr --xtab put $y=sgn($pf1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=sgn($pf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7788,7 +7788,7 @@ pi2 76
 ni2 -76
 y   1.000000
 
-mlr --xtab put $y=sgn($nf1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=sgn($nf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7801,7 +7801,7 @@ pi2 76
 ni2 -76
 y   -1.000000
 
-mlr --xtab put $y=sgn($zf) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=sgn($zf) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7814,7 +7814,7 @@ pi2 76
 ni2 -76
 y   0.000000
 
-mlr --xtab put $y=sgn($pi1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=sgn($pi1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7827,7 +7827,7 @@ pi2 76
 ni2 -76
 y   1
 
-mlr --xtab put $y=sgn($ni1) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=sgn($ni1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7840,7 +7840,7 @@ pi2 76
 ni2 -76
 y   -1
 
-mlr --xtab put $y=sgn($zi) reg_test/input/mixed-types.xtab
+mlr --xtab put $y=sgn($zi) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7853,7 +7853,7 @@ pi2 76
 ni2 -76
 y   0
 
-mlr --xtab put -F $y=sgn($pf1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=sgn($pf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7866,7 +7866,7 @@ pi2 76
 ni2 -76
 y   1.000000
 
-mlr --xtab put -F $y=sgn($nf1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=sgn($nf1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7879,7 +7879,7 @@ pi2 76
 ni2 -76
 y   -1.000000
 
-mlr --xtab put -F $y=sgn($zf) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=sgn($zf) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7892,7 +7892,7 @@ pi2 76
 ni2 -76
 y   0.000000
 
-mlr --xtab put -F $y=sgn($pi1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=sgn($pi1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7905,7 +7905,7 @@ pi2 76
 ni2 -76
 y   1.000000
 
-mlr --xtab put -F $y=sgn($ni1) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=sgn($ni1) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7918,7 +7918,7 @@ pi2 76
 ni2 -76
 y   -1.000000
 
-mlr --xtab put -F $y=sgn($zi) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $y=sgn($zi) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7931,7 +7931,7 @@ pi2 76
 ni2 -76
 y   0.000000
 
-mlr --xtab put $min=min($pf1,$pf2);$max=max($pf1,$pf2) reg_test/input/mixed-types.xtab
+mlr --xtab put $min=min($pf1,$pf2);$max=max($pf1,$pf2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7945,7 +7945,7 @@ ni2 -76
 min 71.200000
 max 73.400000
 
-mlr --xtab put $min=min($pf1,$pi2);$max=max($pf1,$pi2) reg_test/input/mixed-types.xtab
+mlr --xtab put $min=min($pf1,$pi2);$max=max($pf1,$pi2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7959,7 +7959,7 @@ ni2 -76
 min 71.200000
 max 76.000000
 
-mlr --xtab put $min=min($pi1,$pf2);$max=max($pi1,$pf2) reg_test/input/mixed-types.xtab
+mlr --xtab put $min=min($pi1,$pf2);$max=max($pi1,$pf2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7973,7 +7973,7 @@ ni2 -76
 min 73.400000
 max 75.000000
 
-mlr --xtab put $min=min($pi1,$pi2);$max=max($pi1,$pi2) reg_test/input/mixed-types.xtab
+mlr --xtab put $min=min($pi1,$pi2);$max=max($pi1,$pi2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -7987,7 +7987,7 @@ ni2 -76
 min 75
 max 76
 
-mlr --xtab put -F $min=min($pf1,$pf2);$max=max($pf1,$pf2) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $min=min($pf1,$pf2);$max=max($pf1,$pf2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8001,7 +8001,7 @@ ni2 -76
 min 71.200000
 max 73.400000
 
-mlr --xtab put -F $min=min($pf1,$pi2);$max=max($pf1,$pi2) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $min=min($pf1,$pi2);$max=max($pf1,$pi2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8015,7 +8015,7 @@ ni2 -76
 min 71.200000
 max 76.000000
 
-mlr --xtab put -F $min=min($pi1,$pf2);$max=max($pi1,$pf2) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $min=min($pi1,$pf2);$max=max($pi1,$pf2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8029,7 +8029,7 @@ ni2 -76
 min 73.400000
 max 75.000000
 
-mlr --xtab put -F $min=min($pi1,$pi2);$max=max($pi1,$pi2) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $min=min($pi1,$pi2);$max=max($pi1,$pi2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8043,7 +8043,7 @@ ni2 -76
 min 75.000000
 max 76.000000
 
-mlr --xtab put $min=min($pf1,$pf2);$max=max($pf1,$pf2) reg_test/input/mixed-types.xtab
+mlr --xtab put $min=min($pf1,$pf2);$max=max($pf1,$pf2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8057,7 +8057,7 @@ ni2 -76
 min 71.200000
 max 73.400000
 
-mlr --xtab put $min=min($pf1,$pi2);$max=max($pf1,$pi2) reg_test/input/mixed-types.xtab
+mlr --xtab put $min=min($pf1,$pi2);$max=max($pf1,$pi2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8071,7 +8071,7 @@ ni2 -76
 min 71.200000
 max 76.000000
 
-mlr --xtab put $min=min($pi1,$pf2);$max=max($pi1,$pf2) reg_test/input/mixed-types.xtab
+mlr --xtab put $min=min($pi1,$pf2);$max=max($pi1,$pf2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8085,7 +8085,7 @@ ni2 -76
 min 73.400000
 max 75.000000
 
-mlr --xtab put $min=min($pi1,$pi2);$max=max($pi1,$pi2) reg_test/input/mixed-types.xtab
+mlr --xtab put $min=min($pi1,$pi2);$max=max($pi1,$pi2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8099,7 +8099,7 @@ ni2 -76
 min 75
 max 76
 
-mlr --xtab put -F $min=min($pf1,$pf2);$max=max($pf1,$pf2) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $min=min($pf1,$pf2);$max=max($pf1,$pf2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8113,7 +8113,7 @@ ni2 -76
 min 71.200000
 max 73.400000
 
-mlr --xtab put -F $min=min($pf1,$pi2);$max=max($pf1,$pi2) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $min=min($pf1,$pi2);$max=max($pf1,$pi2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8127,7 +8127,7 @@ ni2 -76
 min 71.200000
 max 76.000000
 
-mlr --xtab put -F $min=min($pi1,$pf2);$max=max($pi1,$pf2) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $min=min($pi1,$pf2);$max=max($pi1,$pf2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8141,7 +8141,7 @@ ni2 -76
 min 73.400000
 max 75.000000
 
-mlr --xtab put -F $min=min($pi1,$pi2);$max=max($pi1,$pi2) reg_test/input/mixed-types.xtab
+mlr --xtab put -F $min=min($pi1,$pi2);$max=max($pi1,$pi2) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8155,7 +8155,7 @@ ni2 -76
 min 75.000000
 max 76.000000
 
-mlr --xtab put $sum=$pf1+$pf2;$diff=$pf1-$pf2 reg_test/input/mixed-types.xtab
+mlr --xtab put $sum=$pf1+$pf2;$diff=$pf1-$pf2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8169,7 +8169,7 @@ ni2  -76
 sum  144.600000
 diff -2.200000
 
-mlr --xtab put $sum=$pf1+$pi2;$diff=$pf1-$pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put $sum=$pf1+$pi2;$diff=$pf1-$pi2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8183,7 +8183,7 @@ ni2  -76
 sum  147.200000
 diff -4.800000
 
-mlr --xtab put $sum=$pi1+$pf2;$diff=$pi1-$pf2 reg_test/input/mixed-types.xtab
+mlr --xtab put $sum=$pi1+$pf2;$diff=$pi1-$pf2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8197,7 +8197,7 @@ ni2  -76
 sum  148.400000
 diff 1.600000
 
-mlr --xtab put $sum=$pi1+$pi2;$diff=$pi1-$pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put $sum=$pi1+$pi2;$diff=$pi1-$pi2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8211,7 +8211,7 @@ ni2  -76
 sum  151
 diff -1
 
-mlr --xtab put -F $sum=$pf1+$pf2;$diff=$pf1-$pf2 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $sum=$pf1+$pf2;$diff=$pf1-$pf2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8225,7 +8225,7 @@ ni2  -76
 sum  144.600000
 diff -2.200000
 
-mlr --xtab put -F $sum=$pf1+$pi2;$diff=$pf1-$pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $sum=$pf1+$pi2;$diff=$pf1-$pi2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8239,7 +8239,7 @@ ni2  -76
 sum  147.200000
 diff -4.800000
 
-mlr --xtab put -F $sum=$pi1+$pf2;$diff=$pi1-$pf2 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $sum=$pi1+$pf2;$diff=$pi1-$pf2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8253,7 +8253,7 @@ ni2  -76
 sum  148.400000
 diff 1.600000
 
-mlr --xtab put -F $sum=$pi1+$pi2;$diff=$pi1-$pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $sum=$pi1+$pi2;$diff=$pi1-$pi2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8267,7 +8267,7 @@ ni2  -76
 sum  151.000000
 diff -1.000000
 
-mlr --xtab put $prod=$pf1*$pf2;$quot=$pf1/$pf2 reg_test/input/mixed-types.xtab
+mlr --xtab put $prod=$pf1*$pf2;$quot=$pf1/$pf2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8281,7 +8281,7 @@ ni2  -76
 prod 5226.080000
 quot 0.970027
 
-mlr --xtab put $prod=$pf1*$pi2;$quot=$pf1/$pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put $prod=$pf1*$pi2;$quot=$pf1/$pi2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8295,7 +8295,7 @@ ni2  -76
 prod 5411.200000
 quot 0.936842
 
-mlr --xtab put $prod=$pi1*$pf2;$quot=$pi1/$pf2 reg_test/input/mixed-types.xtab
+mlr --xtab put $prod=$pi1*$pf2;$quot=$pi1/$pf2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8309,7 +8309,7 @@ ni2  -76
 prod 5505.000000
 quot 1.021798
 
-mlr --xtab put $prod=$pi1*$pi2;$quot=$pi1/$pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put $prod=$pi1*$pi2;$quot=$pi1/$pi2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8323,7 +8323,7 @@ ni2  -76
 prod 5700
 quot 0.986842
 
-mlr --xtab put -F $prod=$pf1*$pf2;$quot=$pf1/$pf2 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $prod=$pf1*$pf2;$quot=$pf1/$pf2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8337,7 +8337,7 @@ ni2  -76
 prod 5226.080000
 quot 0.970027
 
-mlr --xtab put -F $prod=$pf1*$pi2;$quot=$pf1/$pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $prod=$pf1*$pi2;$quot=$pf1/$pi2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8351,7 +8351,7 @@ ni2  -76
 prod 5411.200000
 quot 0.936842
 
-mlr --xtab put -F $prod=$pi1*$pf2;$quot=$pi1/$pf2 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $prod=$pi1*$pf2;$quot=$pi1/$pf2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8365,7 +8365,7 @@ ni2  -76
 prod 5505.000000
 quot 1.021798
 
-mlr --xtab put -F $prod=$pi1*$pi2;$quot=$pi1/$pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $prod=$pi1*$pi2;$quot=$pi1/$pi2 ./reg_test/input/mixed-types.xtab
 pf1  71.2
 nf1  -71.2
 zf   0.0
@@ -8379,7 +8379,7 @@ ni2  -76
 prod 5700.000000
 quot 0.986842
 
-mlr --xtab put $iquot=$pf1//$pf2;$mod=$pf1%$pf2 reg_test/input/mixed-types.xtab
+mlr --xtab put $iquot=$pf1//$pf2;$mod=$pf1%$pf2 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8393,7 +8393,7 @@ ni2   -76
 iquot 0.000000
 mod   71.200000
 
-mlr --xtab put $iquot=$pf1//$pi2;$mod=$pf1%$pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put $iquot=$pf1//$pi2;$mod=$pf1%$pi2 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8407,7 +8407,7 @@ ni2   -76
 iquot 0.000000
 mod   71.200000
 
-mlr --xtab put $iquot=$pi1//$pf2;$mod=$pi1%$pf2 reg_test/input/mixed-types.xtab
+mlr --xtab put $iquot=$pi1//$pf2;$mod=$pi1%$pf2 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8421,7 +8421,7 @@ ni2   -76
 iquot 1.000000
 mod   1.600000
 
-mlr --xtab put $iquot=$pi1//$pi2;$mod=$pi1%$pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put $iquot=$pi1//$pi2;$mod=$pi1%$pi2 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8435,7 +8435,7 @@ ni2   -76
 iquot 0
 mod   75
 
-mlr --xtab put -F $iquot=$pf1//$pf2;$mod=$pf1%$pf2 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $iquot=$pf1//$pf2;$mod=$pf1%$pf2 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8449,7 +8449,7 @@ ni2   -76
 iquot 0.000000
 mod   71.200000
 
-mlr --xtab put -F $iquot=$pf1//$pi2;$mod=$pf1%$pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $iquot=$pf1//$pi2;$mod=$pf1%$pi2 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8463,7 +8463,7 @@ ni2   -76
 iquot 0.000000
 mod   71.200000
 
-mlr --xtab put -F $iquot=$pi1//$pf2;$mod=$pi1%$pf2 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $iquot=$pi1//$pf2;$mod=$pi1%$pf2 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8477,7 +8477,7 @@ ni2   -76
 iquot 1.000000
 mod   1.600000
 
-mlr --xtab put -F $iquot=$pi1//$pi2;$mod=$pi1%$pi2 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $iquot=$pi1//$pi2;$mod=$pi1%$pi2 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8491,7 +8491,7 @@ ni2   -76
 iquot 0.000000
 mod   75.000000
 
-mlr --xtab put $a=roundm($pf1,10.0);$b=roundm($pf1,-10.0) reg_test/input/mixed-types.xtab
+mlr --xtab put $a=roundm($pf1,10.0);$b=roundm($pf1,-10.0) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8505,7 +8505,7 @@ ni2 -76
 a   70.000000
 b   70.000000
 
-mlr --xtab put $a=roundm($pf1,10)  ;$b=roundm($pf1,-10)   reg_test/input/mixed-types.xtab
+mlr --xtab put $a=roundm($pf1,10)  ;$b=roundm($pf1,-10)   ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8519,7 +8519,7 @@ ni2 -76
 a   70.000000
 b   70.000000
 
-mlr --xtab put $a=roundm($pi1,10.0);$b=roundm($pi1,-10.0) reg_test/input/mixed-types.xtab
+mlr --xtab put $a=roundm($pi1,10.0);$b=roundm($pi1,-10.0) ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8533,7 +8533,7 @@ ni2 -76
 a   80.000000
 b   80.000000
 
-mlr --xtab put $a=roundm($pi1,10)  ;$b=roundm($pi1,-10)   reg_test/input/mixed-types.xtab
+mlr --xtab put $a=roundm($pi1,10)  ;$b=roundm($pi1,-10)   ./reg_test/input/mixed-types.xtab
 pf1 71.2
 nf1 -71.2
 zf  0.0
@@ -8548,22 +8548,163 @@ a   70
 b   70
 
 
+================================================================
+DSL SCIENTIFIC NOTATION IN FIELD VALUES
+
+mlr --opprint put $y=$x+1 ./reg_test/input/scinot.dkvp
+x       y
+123     124
+123.    124.000000
+123.4   124.400000
+.234    1.234000
+1e2     101.000000
+1e-2    1.010000
+1.2e3   1201.000000
+1.e3    1001.000000
+1.2e-3  1.001200
+1.e-3   1.001000
+.2e3    201.000000
+.2e-3   1.000200
+1.e-3   1.001000
+-123    -122
+-123.   -122.000000
+-123.4  -122.400000
+-.234   0.766000
+-1e2    -99.000000
+-1e-2   0.990000
+-1.2e3  -1199.000000
+-1.e3   -999.000000
+-1.2e-3 0.998800
+-1.e-3  0.999000
+-.2e3   -199.000000
+-.2e-3  0.999800
+-1.e-3  0.999000
+
+
+================================================================
+DSL SCIENTIFIC NOTATION IN EXPRESSION LITERALS
+
+mlr --opprint put $y = 123     + $i ./reg_test/input/scinot1.dkvp
+i y
+1 124
+
+mlr --opprint put $y = 123.    + $i ./reg_test/input/scinot1.dkvp
+i y
+1 124.000000
+
+mlr --opprint put $y = 123.4   + $i ./reg_test/input/scinot1.dkvp
+i y
+1 124.400000
+
+mlr --opprint put $y = .234    + $i ./reg_test/input/scinot1.dkvp
+i y
+1 1.234000
+
+mlr --opprint put $y = 1e2     + $i ./reg_test/input/scinot1.dkvp
+i y
+1 101.000000
+
+mlr --opprint put $y = 1e-2    + $i ./reg_test/input/scinot1.dkvp
+i y
+1 1.010000
+
+mlr --opprint put $y = 1.2e3   + $i ./reg_test/input/scinot1.dkvp
+i y
+1 1201.000000
+
+mlr --opprint put $y = 1.e3    + $i ./reg_test/input/scinot1.dkvp
+i y
+1 1001.000000
+
+mlr --opprint put $y = 1.2e-3  + $i ./reg_test/input/scinot1.dkvp
+i y
+1 1.001200
+
+mlr --opprint put $y = 1.e-3   + $i ./reg_test/input/scinot1.dkvp
+i y
+1 1.001000
+
+mlr --opprint put $y = .2e3    + $i ./reg_test/input/scinot1.dkvp
+i y
+1 201.000000
+
+mlr --opprint put $y = .2e-3   + $i ./reg_test/input/scinot1.dkvp
+i y
+1 1.000200
+
+mlr --opprint put $y = 1.e-3   + $i ./reg_test/input/scinot1.dkvp
+i y
+1 1.001000
+
+mlr --opprint put $y = -123    + $i ./reg_test/input/scinot1.dkvp
+i y
+1 -122
+
+mlr --opprint put $y = -123.   + $i ./reg_test/input/scinot1.dkvp
+i y
+1 -122.000000
+
+mlr --opprint put $y = -123.4  + $i ./reg_test/input/scinot1.dkvp
+i y
+1 -122.400000
+
+mlr --opprint put $y = -.234   + $i ./reg_test/input/scinot1.dkvp
+i y
+1 0.766000
+
+mlr --opprint put $y = -1e2    + $i ./reg_test/input/scinot1.dkvp
+i y
+1 -99.000000
+
+mlr --opprint put $y = -1e-2   + $i ./reg_test/input/scinot1.dkvp
+i y
+1 0.990000
+
+mlr --opprint put $y = -1.2e3  + $i ./reg_test/input/scinot1.dkvp
+i y
+1 -1199.000000
+
+mlr --opprint put $y = -1.e3   + $i ./reg_test/input/scinot1.dkvp
+i y
+1 -999.000000
+
+mlr --opprint put $y = -1.2e-3 + $i ./reg_test/input/scinot1.dkvp
+i y
+1 0.998800
+
+mlr --opprint put $y = -1.e-3  + $i ./reg_test/input/scinot1.dkvp
+i y
+1 0.999000
+
+mlr --opprint put $y = -.2e3   + $i ./reg_test/input/scinot1.dkvp
+i y
+1 -199.000000
+
+mlr --opprint put $y = -.2e-3  + $i ./reg_test/input/scinot1.dkvp
+i y
+1 0.999800
+
+mlr --opprint put $y = -1.e-3  + $i ./reg_test/input/scinot1.dkvp
+i y
+1 0.999000
+
+
 ================================================================
 STATS1/STEP INT/FLOAT
 
-mlr --opprint step -a rsum,delta,counter -f x,y,z reg_test/input/int-float.dkvp
+mlr --opprint step -a rsum,delta,counter -f x,y,z ./reg_test/input/int-float.dkvp
 x y    z    x_rsum x_delta x_counter y_rsum    y_delta  y_counter z_rsum    z_delta   z_counter
 1 10.1 20   1      0       1         10.100000 0        1         20        0         1
 2 10.2 30   3      1       2         20.300000 0.100000 2         50        10        2
 3 10.3 40.8 6      1       3         30.600000 0.100000 3         90.800000 10.800000 3
 
-mlr --opprint step -F -a rsum,delta,counter -f x,y,z reg_test/input/int-float.dkvp
+mlr --opprint step -F -a rsum,delta,counter -f x,y,z ./reg_test/input/int-float.dkvp
 x y    z    x_rsum   x_delta  x_counter y_rsum    y_delta  y_counter z_rsum    z_delta   z_counter
 1 10.1 20   1.000000 0.000000 1.000000  10.100000 0.000000 1.000000  20.000000 0.000000  1.000000
 2 10.2 30   3.000000 1.000000 2.000000  20.300000 0.100000 2.000000  50.000000 10.000000 2.000000
 3 10.3 40.8 6.000000 1.000000 3.000000  30.600000 0.100000 3.000000  90.800000 10.800000 3.000000
 
-mlr --oxtab stats1 -a min,max,sum,count -f x,y,z reg_test/input/int-float.dkvp
+mlr --oxtab stats1 -a min,max,sum,count -f x,y,z ./reg_test/input/int-float.dkvp
 x_min   1
 x_max   1
 x_sum   6
@@ -8577,7 +8718,7 @@ z_max   20.000000
 z_sum   90.800000
 z_count 3
 
-mlr --oxtab stats1 -F -a min,max,sum,count -f x,y,z reg_test/input/int-float.dkvp
+mlr --oxtab stats1 -F -a min,max,sum,count -f x,y,z ./reg_test/input/int-float.dkvp
 x_min   1.000000
 x_max   1.000000
 x_sum   6.000000
@@ -8595,7 +8736,7 @@ z_count 3.000000
 ================================================================
 DSL PYTHONIC DIVISION
 
-mlr --xtab put $quot=$pf1/10.0;$iquot=$pf1//10.0;$mod=$pf1%10.0 reg_test/input/mixed-types.xtab
+mlr --xtab put $quot=$pf1/10.0;$iquot=$pf1//10.0;$mod=$pf1%10.0 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8610,7 +8751,7 @@ quot  7.120000
 iquot 7.000000
 mod   1.200000
 
-mlr --xtab put $quot=$pi1/10  ;$iquot=$pi1//10  ;$mod=$pi1%10   reg_test/input/mixed-types.xtab
+mlr --xtab put $quot=$pi1/10  ;$iquot=$pi1//10  ;$mod=$pi1%10   ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8625,7 +8766,7 @@ quot  7.500000
 iquot 7
 mod   5
 
-mlr --xtab put $quot=$nf1/10.0;$iquot=$nf1//10.0;$mod=$nf1%10.0 reg_test/input/mixed-types.xtab
+mlr --xtab put $quot=$nf1/10.0;$iquot=$nf1//10.0;$mod=$nf1%10.0 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8640,7 +8781,7 @@ quot  -7.120000
 iquot -8.000000
 mod   8.800000
 
-mlr --xtab put $quot=$ni1/10  ;$iquot=$ni1//10  ;$mod=$ni1%10   reg_test/input/mixed-types.xtab
+mlr --xtab put $quot=$ni1/10  ;$iquot=$ni1//10  ;$mod=$ni1%10   ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8655,7 +8796,7 @@ quot  -7.500000
 iquot -8
 mod   5
 
-mlr --xtab put -F $quot=$pf1/10.0;$iquot=$pf1//10.0;$mod=$pf1%10.0 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $quot=$pf1/10.0;$iquot=$pf1//10.0;$mod=$pf1%10.0 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8670,7 +8811,7 @@ quot  7.120000
 iquot 7.000000
 mod   1.200000
 
-mlr --xtab put -F $quot=$pi1/10  ;$iquot=$pi1//10  ;$mod=$pi1%10   reg_test/input/mixed-types.xtab
+mlr --xtab put -F $quot=$pi1/10  ;$iquot=$pi1//10  ;$mod=$pi1%10   ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8685,7 +8826,7 @@ quot  7.500000
 iquot 7.000000
 mod   5.000000
 
-mlr --xtab put -F $quot=$nf1/10.0;$iquot=$nf1//10.0;$mod=$nf1%10.0 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $quot=$nf1/10.0;$iquot=$nf1//10.0;$mod=$nf1%10.0 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8700,7 +8841,7 @@ quot  -7.120000
 iquot -8.000000
 mod   8.800000
 
-mlr --xtab put -F $quot=$ni1/10  ;$iquot=$ni1//10  ;$mod=$ni1%10   reg_test/input/mixed-types.xtab
+mlr --xtab put -F $quot=$ni1/10  ;$iquot=$ni1//10  ;$mod=$ni1%10   ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8715,7 +8856,7 @@ quot  -7.500000
 iquot -8.000000
 mod   5.000000
 
-mlr --xtab put $quot=$pf1/-10.0;$iquot=$pf1//-10.0;$mod=$pf1%-10.0 reg_test/input/mixed-types.xtab
+mlr --xtab put $quot=$pf1/-10.0;$iquot=$pf1//-10.0;$mod=$pf1%-10.0 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8730,7 +8871,7 @@ quot  -7.120000
 iquot -8.000000
 mod   -8.800000
 
-mlr --xtab put $quot=$pi1/-10  ;$iquot=$pi1//-10  ;$mod=$pi1%-10   reg_test/input/mixed-types.xtab
+mlr --xtab put $quot=$pi1/-10  ;$iquot=$pi1//-10  ;$mod=$pi1%-10   ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8745,7 +8886,7 @@ quot  -7.500000
 iquot -8
 mod   -5
 
-mlr --xtab put $quot=$nf1/-10.0;$iquot=$nf1//-10.0;$mod=$nf1%-10.0 reg_test/input/mixed-types.xtab
+mlr --xtab put $quot=$nf1/-10.0;$iquot=$nf1//-10.0;$mod=$nf1%-10.0 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8760,7 +8901,7 @@ quot  7.120000
 iquot 7.000000
 mod   -1.200000
 
-mlr --xtab put $quot=$ni1/-10  ;$iquot=$ni1//-10  ;$mod=$ni1%-10   reg_test/input/mixed-types.xtab
+mlr --xtab put $quot=$ni1/-10  ;$iquot=$ni1//-10  ;$mod=$ni1%-10   ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8775,7 +8916,7 @@ quot  7.500000
 iquot 7
 mod   -5
 
-mlr --xtab put -F $quot=$pf1/-10.0;$iquot=$pf1//-10.0;$mod=$pf1%-10.0 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $quot=$pf1/-10.0;$iquot=$pf1//-10.0;$mod=$pf1%-10.0 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8790,7 +8931,7 @@ quot  -7.120000
 iquot -8.000000
 mod   -8.800000
 
-mlr --xtab put -F $quot=$pi1/-10  ;$iquot=$pi1//-10  ;$mod=$pi1%-10   reg_test/input/mixed-types.xtab
+mlr --xtab put -F $quot=$pi1/-10  ;$iquot=$pi1//-10  ;$mod=$pi1%-10   ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8805,7 +8946,7 @@ quot  -7.500000
 iquot -8.000000
 mod   -5.000000
 
-mlr --xtab put -F $quot=$nf1/-10.0;$iquot=$nf1//-10.0;$mod=$nf1%-10.0 reg_test/input/mixed-types.xtab
+mlr --xtab put -F $quot=$nf1/-10.0;$iquot=$nf1//-10.0;$mod=$nf1%-10.0 ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8820,7 +8961,7 @@ quot  7.120000
 iquot 7.000000
 mod   -1.200000
 
-mlr --xtab put -F $quot=$ni1/-10  ;$iquot=$ni1//-10  ;$mod=$ni1%-10   reg_test/input/mixed-types.xtab
+mlr --xtab put -F $quot=$ni1/-10  ;$iquot=$ni1//-10  ;$mod=$ni1%-10   ./reg_test/input/mixed-types.xtab
 pf1   71.2
 nf1   -71.2
 zf    0.0
@@ -8839,19 +8980,19 @@ mod   -5.000000
 ================================================================
 DSL REGEX MATCHING
 
-mlr filter -v $x =~ "bcd" reg_test/input/regex.dkvp
+mlr filter -v $x =~ "bcd" ./reg_test/input/regex.dkvp
 =~ (operator):
     x (field_name).
     bcd (literal).
 x=abcd,y=ghi
 x=abcde,y=ghi
 
-mlr filter -v $x =~ "^bcd" reg_test/input/regex.dkvp
+mlr filter -v $x =~ "^bcd" ./reg_test/input/regex.dkvp
 =~ (operator):
     x (field_name).
     ^bcd (literal).
 
-mlr filter -v $x =~ "^abc" reg_test/input/regex.dkvp
+mlr filter -v $x =~ "^abc" ./reg_test/input/regex.dkvp
 =~ (operator):
     x (field_name).
     ^abc (literal).
@@ -8859,19 +9000,19 @@ x=abc,y=def
 x=abcd,y=ghi
 x=abcde,y=ghi
 
-mlr filter -v $x =~ "^abc$" reg_test/input/regex.dkvp
+mlr filter -v $x =~ "^abc$" ./reg_test/input/regex.dkvp
 =~ (operator):
     x (field_name).
     ^abc$ (literal).
 x=abc,y=def
 
-mlr filter -v $x =~ "^a.*d$" reg_test/input/regex.dkvp
+mlr filter -v $x =~ "^a.*d$" ./reg_test/input/regex.dkvp
 =~ (operator):
     x (field_name).
     ^a.*d$ (literal).
 x=abcd,y=ghi
 
-mlr filter -v $x =~ "^a.*"."d$" reg_test/input/regex.dkvp
+mlr filter -v $x =~ "^a.*"."d$" ./reg_test/input/regex.dkvp
 =~ (operator):
     x (field_name).
     . (operator):
@@ -8879,13 +9020,13 @@ mlr filter -v $x =~ "^a.*"."d$" reg_test/input/regex.dkvp
         d$ (literal).
 x=abcd,y=ghi
 
-mlr filter -v $y =~ "\".." reg_test/input/regex.dkvp
+mlr filter -v $y =~ "\".." ./reg_test/input/regex.dkvp
 =~ (operator):
     y (field_name).
     \".. (literal).
 x=ABCDE,y="GHI"
 
-mlr filter -v $x =~ "bcd"i reg_test/input/regex.dkvp
+mlr filter -v $x =~ "bcd"i ./reg_test/input/regex.dkvp
 =~ (operator):
     x (field_name).
     bcd (regexi).
@@ -8895,12 +9036,12 @@ x=abcde,y=ghi
 x=ABCDE,y=GHI
 x=ABCDE,y="GHI"
 
-mlr filter -v $x =~ "^bcd"i reg_test/input/regex.dkvp
+mlr filter -v $x =~ "^bcd"i ./reg_test/input/regex.dkvp
 =~ (operator):
     x (field_name).
     ^bcd (regexi).
 
-mlr filter -v $x =~ "^abc"i reg_test/input/regex.dkvp
+mlr filter -v $x =~ "^abc"i ./reg_test/input/regex.dkvp
 =~ (operator):
     x (field_name).
     ^abc (regexi).
@@ -8912,21 +9053,21 @@ x=abcde,y=ghi
 x=ABCDE,y=GHI
 x=ABCDE,y="GHI"
 
-mlr filter -v $x =~ "^abc$"i reg_test/input/regex.dkvp
+mlr filter -v $x =~ "^abc$"i ./reg_test/input/regex.dkvp
 =~ (operator):
     x (field_name).
     ^abc$ (regexi).
 x=abc,y=def
 x=ABC,y=DEF
 
-mlr filter -v $x =~ "^a.*d$"i reg_test/input/regex.dkvp
+mlr filter -v $x =~ "^a.*d$"i ./reg_test/input/regex.dkvp
 =~ (operator):
     x (field_name).
     ^a.*d$ (regexi).
 x=abcd,y=ghi
 x=ABCD,y=GHI
 
-mlr filter -v $x =~ "^a.*"."d$"i reg_test/input/regex.dkvp
+mlr filter -v $x =~ "^a.*"."d$"i ./reg_test/input/regex.dkvp
 =~ (operator):
     x (field_name).
     . (operator):
@@ -8938,7 +9079,7 @@ x=abcd,y=ghi
 ================================================================
 DSL DATETIME FUNCTIONS
 
-mlr --csvlite put $gmt = sec2gmt($sec) reg_test/input/sec2gmt
+mlr --csvlite put $gmt = sec2gmt($sec) ./reg_test/input/sec2gmt
 sec,gmt
 0,1970-01-01T00:00:00Z
 1,1970-01-01T00:00:01Z
@@ -8955,7 +9096,7 @@ sec,gmt
 1500000000,2017-07-14T02:40:00Z
 2000000000,2033-05-18T03:33:20Z
 
-mlr --csvlite put $sec = gmt2sec($gmt) reg_test/input/gmt2sec
+mlr --csvlite put $sec = gmt2sec($gmt) ./reg_test/input/gmt2sec
 gmt,sec
 1970-01-01T00:00:00Z,0
 1970-01-01T00:00:01Z,1
@@ -8972,7 +9113,7 @@ gmt,sec
 2017-07-14T02:40:00Z,1500000000
 2033-05-18T03:33:20Z,2000000000
 
-mlr --csvlite put $gmt = strftime($sec, "%Y-%m-%dT%H:%M:%SZ") reg_test/input/sec2gmt
+mlr --csvlite put $gmt = strftime($sec, "%Y-%m-%dT%H:%M:%SZ") ./reg_test/input/sec2gmt
 sec,gmt
 0,1970-01-01T00:00:00Z
 1,1970-01-01T00:00:01Z
@@ -8989,7 +9130,7 @@ sec,gmt
 1500000000,2017-07-14T02:40:00Z
 2000000000,2033-05-18T03:33:20Z
 
-mlr --csvlite put $sec = strptime($gmt, "%Y-%m-%dT%H:%M:%SZ") reg_test/input/gmt2sec
+mlr --csvlite put $sec = strptime($gmt, "%Y-%m-%dT%H:%M:%SZ") ./reg_test/input/gmt2sec
 gmt,sec
 1970-01-01T00:00:00Z,0
 1970-01-01T00:00:01Z,1
@@ -9006,7 +9147,7 @@ gmt,sec
 2017-07-14T02:40:00Z,1500000000
 2033-05-18T03:33:20Z,2000000000
 
-mlr --csvlite sec2gmt sec reg_test/input/sec2gmt
+mlr --csvlite sec2gmt sec ./reg_test/input/sec2gmt
 sec
 1970-01-01T00:00:00Z
 1970-01-01T00:00:01Z
@@ -9023,7 +9164,7 @@ sec
 2017-07-14T02:40:00Z
 2033-05-18T03:33:20Z
 
-mlr --opprint put $hms=sec2hms($sec);   $resec=hms2sec($hms);   $diff=$resec-$sec reg_test/input/sec2xhms
+mlr --opprint put $hms=sec2hms($sec);   $resec=hms2sec($hms);   $diff=$resec-$sec ./reg_test/input/sec2xhms
 sec     hms        resec   diff
 0       00:00:00   0       0
 1       00:00:01   1       0
@@ -9053,7 +9194,7 @@ sec     hms        resec   diff
 -864000 -240:00:00 -864000 0
 -864001 -240:00:01 -864001 0
 
-mlr --opprint put $hms=fsec2hms($sec);  $resec=hms2fsec($hms);  $diff=$resec-$sec reg_test/input/fsec2xhms
+mlr --opprint put $hms=fsec2hms($sec);  $resec=hms2fsec($hms);  $diff=$resec-$sec ./reg_test/input/fsec2xhms
 sec        hms               resec          diff
 0.25       0:00:00.250000    0.250000       0.000000
 1.25       0:00:01.250000    1.250000       0.000000
@@ -9084,7 +9225,7 @@ sec        hms               resec          diff
 -864000.25 -240:00:00.250000 -864000.250000 0.000000
 -864001.25 -240:00:01.250000 -864001.250000 0.000000
 
-mlr --opprint put $hms=sec2dhms($sec);  $resec=dhms2sec($hms);  $diff=$resec-$sec reg_test/input/sec2xhms
+mlr --opprint put $hms=sec2dhms($sec);  $resec=dhms2sec($hms);  $diff=$resec-$sec ./reg_test/input/sec2xhms
 sec     hms           resec   diff
 0       0s            0       0
 1       1s            1       0
@@ -9114,7 +9255,7 @@ sec     hms           resec   diff
 -864000 -10d00h00m00s -864000 0
 -864001 -10d00h00m01s -864001 0
 
-mlr --opprint put $hms=fsec2dhms($sec); $resec=dhms2fsec($hms); $diff=$resec-$sec reg_test/input/fsec2xhms
+mlr --opprint put $hms=fsec2dhms($sec); $resec=dhms2fsec($hms); $diff=$resec-$sec ./reg_test/input/fsec2xhms
 sec        hms                  resec          diff
 0.25       0.250000s            0.250000       0.000000
 1.25       1.250000s            1.250000       0.000000
@@ -9149,70 +9290,70 @@ sec        hms                  resec          diff
 ================================================================
 DSL SUB/GSUB
 
-mlr --opprint put $y = sub($x, "e.*l",        "") reg_test/input/sub.dat
+mlr --opprint put $y = sub($x, "e.*l",        "") ./reg_test/input/sub.dat
 x     y
 hello ho
 HELLO HELLO
 world world
 WORLD WORLD
 
-mlr --opprint put $y = sub($x, "e.*l"i,       "") reg_test/input/sub.dat
+mlr --opprint put $y = sub($x, "e.*l"i,       "") ./reg_test/input/sub.dat
 x     y
 hello ho
 HELLO HO
 world world
 WORLD WORLD
 
-mlr --opprint put $y = sub($x, "e.*"."l",     "") reg_test/input/sub.dat
+mlr --opprint put $y = sub($x, "e.*"."l",     "") ./reg_test/input/sub.dat
 x     y
 hello ho
 HELLO HELLO
 world world
 WORLD WORLD
 
-mlr --opprint put $y = sub($x, "e.*l",        "y123y") reg_test/input/sub.dat
+mlr --opprint put $y = sub($x, "e.*l",        "y123y") ./reg_test/input/sub.dat
 x     y
 hello hy123yo
 HELLO HELLO
 world world
 WORLD WORLD
 
-mlr --opprint put $y = sub($x, "e.*l"i,       "y123y") reg_test/input/sub.dat
+mlr --opprint put $y = sub($x, "e.*l"i,       "y123y") ./reg_test/input/sub.dat
 x     y
 hello hy123yo
 HELLO Hy123yO
 world world
 WORLD WORLD
 
-mlr --opprint put $y = sub($x, "e.*"."l",     "y123y") reg_test/input/sub.dat
+mlr --opprint put $y = sub($x, "e.*"."l",     "y123y") ./reg_test/input/sub.dat
 x     y
 hello hy123yo
 HELLO HELLO
 world world
 WORLD WORLD
 
-mlr --opprint put $y = sub($x, "([hg])e.*l(.)", "y\1y123\2y") reg_test/input/sub.dat
+mlr --opprint put $y = sub($x, "([hg])e.*l(.)", "y\1y123\2y") ./reg_test/input/sub.dat
 x     y
 hello yhy123oy
 HELLO HELLO
 world world
 WORLD WORLD
 
-mlr --opprint put $y = sub($x, "([hg])e.*l.",   "y\1y123\2y") reg_test/input/sub.dat
+mlr --opprint put $y = sub($x, "([hg])e.*l.",   "y\1y123\2y") ./reg_test/input/sub.dat
 x     y
 hello yhy123\2y
 HELLO HELLO
 world world
 WORLD WORLD
 
-mlr --opprint put $y = sub($x, "([hg])e.*l(.)", "y\1y123.y") reg_test/input/sub.dat
+mlr --opprint put $y = sub($x, "([hg])e.*l(.)", "y\1y123.y") ./reg_test/input/sub.dat
 x     y
 hello yhy123.y
 HELLO HELLO
 world world
 WORLD WORLD
 
-mlr --opprint put $y = sub($x,  "a",    "aa") reg_test/input/gsub.dat
+mlr --opprint put $y = sub($x,  "a",    "aa") ./reg_test/input/gsub.dat
 x          y
 lmnop      lmnop
 abcdefg    aabcdefg
@@ -9221,7 +9362,7 @@ LMNOP      LMNOP
 ABCDEFG    ABCDEFG
 ABABBABBBA ABABBABBBA
 
-mlr --opprint put $y = gsub($x, "a",    "aa") reg_test/input/gsub.dat
+mlr --opprint put $y = gsub($x, "a",    "aa") ./reg_test/input/gsub.dat
 x          y
 lmnop      lmnop
 abcdefg    aabcdefg
@@ -9230,7 +9371,7 @@ LMNOP      LMNOP
 ABCDEFG    ABCDEFG
 ABABBABBBA ABABBABBBA
 
-mlr --opprint put $y = gsub($x, "A",    "Aa") reg_test/input/gsub.dat
+mlr --opprint put $y = gsub($x, "A",    "Aa") ./reg_test/input/gsub.dat
 x          y
 lmnop      lmnop
 abcdefg    abcdefg
@@ -9239,7 +9380,7 @@ LMNOP      LMNOP
 ABCDEFG    AaBCDEFG
 ABABBABBBA AaBAaBBAaBBBAa
 
-mlr --opprint put $y = gsub($x, "a"i,   "Aa") reg_test/input/gsub.dat
+mlr --opprint put $y = gsub($x, "a"i,   "Aa") ./reg_test/input/gsub.dat
 x          y
 lmnop      lmnop
 abcdefg    Aabcdefg
@@ -9248,7 +9389,7 @@ LMNOP      LMNOP
 ABCDEFG    AaBCDEFG
 ABABBABBBA AaBAaBBAaBBBAa
 
-mlr --opprint put $y = gsub($x, "A"i,   "Aa") reg_test/input/gsub.dat
+mlr --opprint put $y = gsub($x, "A"i,   "Aa") ./reg_test/input/gsub.dat
 x          y
 lmnop      lmnop
 abcdefg    Aabcdefg
@@ -9257,7 +9398,7 @@ LMNOP      LMNOP
 ABCDEFG    AaBCDEFG
 ABABBABBBA AaBAaBBAaBBBAa
 
-mlr --opprint put $y = gsub($x, "a(.)", "aa\1\1\1") reg_test/input/gsub.dat
+mlr --opprint put $y = gsub($x, "a(.)", "aa\1\1\1") ./reg_test/input/gsub.dat
 x          y
 lmnop      lmnop
 abcdefg    aabbbcdefg
@@ -9266,7 +9407,7 @@ LMNOP      LMNOP
 ABCDEFG    ABCDEFG
 ABABBABBBA ABABBABBBA
 
-mlr --opprint put $y = sub($x,  "a",    "") reg_test/input/gsub.dat
+mlr --opprint put $y = sub($x,  "a",    "") ./reg_test/input/gsub.dat
 x          y
 lmnop      lmnop
 abcdefg    bcdefg
@@ -9275,7 +9416,7 @@ LMNOP      LMNOP
 ABCDEFG    ABCDEFG
 ABABBABBBA ABABBABBBA
 
-mlr --opprint put $y = gsub($x, "a",    "") reg_test/input/gsub.dat
+mlr --opprint put $y = gsub($x, "a",    "") ./reg_test/input/gsub.dat
 x          y
 lmnop      lmnop
 abcdefg    bcdefg
@@ -9284,7 +9425,7 @@ LMNOP      LMNOP
 ABCDEFG    ABCDEFG
 ABABBABBBA ABABBABBBA
 
-mlr --opprint put $y = gsub($x, "A",    "") reg_test/input/gsub.dat
+mlr --opprint put $y = gsub($x, "A",    "") ./reg_test/input/gsub.dat
 x          y
 lmnop      lmnop
 abcdefg    abcdefg
@@ -9293,7 +9434,7 @@ LMNOP      LMNOP
 ABCDEFG    BCDEFG
 ABABBABBBA BBBBBB
 
-mlr --opprint put $y = gsub($x, "a"i,   "") reg_test/input/gsub.dat
+mlr --opprint put $y = gsub($x, "a"i,   "") ./reg_test/input/gsub.dat
 x          y
 lmnop      lmnop
 abcdefg    bcdefg
@@ -9302,7 +9443,7 @@ LMNOP      LMNOP
 ABCDEFG    BCDEFG
 ABABBABBBA BBBBBB
 
-mlr --opprint put $y = gsub($x, "A"i,   "") reg_test/input/gsub.dat
+mlr --opprint put $y = gsub($x, "A"i,   "") ./reg_test/input/gsub.dat
 x          y
 lmnop      lmnop
 abcdefg    bcdefg
@@ -9315,62 +9456,62 @@ ABABBABBBA BBBBBB
 ================================================================
 CHAINING
 
-mlr cat then cat reg_test/input/short
+mlr cat then cat ./reg_test/input/short
 a=1
 b=2
 c=3
 
-mlr cat then tac reg_test/input/short
+mlr cat then tac ./reg_test/input/short
 c=3
 b=2
 a=1
 
-mlr tac then cat reg_test/input/short
+mlr tac then cat ./reg_test/input/short
 c=3
 b=2
 a=1
 
-mlr tac then tac reg_test/input/short
+mlr tac then tac ./reg_test/input/short
 a=1
 b=2
 c=3
 
-mlr cat then cat then cat reg_test/input/short
+mlr cat then cat then cat ./reg_test/input/short
 a=1
 b=2
 c=3
 
-mlr cat then cat then tac reg_test/input/short
+mlr cat then cat then tac ./reg_test/input/short
 c=3
 b=2
 a=1
 
-mlr cat then tac then cat reg_test/input/short
+mlr cat then tac then cat ./reg_test/input/short
 c=3
 b=2
 a=1
 
-mlr cat then tac then tac reg_test/input/short
+mlr cat then tac then tac ./reg_test/input/short
 a=1
 b=2
 c=3
 
-mlr tac then cat then cat reg_test/input/short
+mlr tac then cat then cat ./reg_test/input/short
 c=3
 b=2
 a=1
 
-mlr tac then cat then tac reg_test/input/short
+mlr tac then cat then tac ./reg_test/input/short
 a=1
 b=2
 c=3
 
-mlr tac then tac then cat reg_test/input/short
+mlr tac then tac then cat ./reg_test/input/short
 a=1
 b=2
 c=3
 
-mlr tac then tac then tac reg_test/input/short
+mlr tac then tac then tac ./reg_test/input/short
 c=3
 b=2
 a=1
@@ -9379,15 +9520,15 @@ a=1
 ================================================================
 NUMBER FORMATTING
 
-mlr --opprint stats1 -a sum -f x reg_test/input/ofmt.dat
+mlr --opprint stats1 -a sum -f x ./reg_test/input/ofmt.dat
 x_sum
 6
 
-mlr --ofmt %.3lf --opprint stats1 -a sum -f x reg_test/input/ofmt.dat
+mlr --ofmt %.3lf --opprint stats1 -a sum -f x ./reg_test/input/ofmt.dat
 x_sum
 6
 
-mlr --opprint --ofmt %.3lf stats1 -a sum -f x reg_test/input/ofmt.dat
+mlr --opprint --ofmt %.3lf stats1 -a sum -f x ./reg_test/input/ofmt.dat
 x_sum
 6
 
@@ -9395,7 +9536,7 @@ x_sum
 ================================================================
 IMPLICIT-HEADER-CSV INPUT
 
-mlr --irs crlf --no-mmap --icsvlite --ifs , --opprint cut -x -f b/ reg_test/input/multi-sep.csv
+mlr --irs crlf --no-mmap --icsvlite --ifs , --opprint cut -x -f b/ ./reg_test/input/multi-sep.csv
 a/   i/ x/                    y/
 wye/ 0/ 0.641593543645736508/ 0.262688053894177098
 eks/ 1/ 0.827614412562742041/ 0.715431942006308552
@@ -9403,7 +9544,7 @@ zee/ 2/ 0.923068348748175560/ 0.009737410587136359
 zee/ 3/ 0.000047786161325772/ 0.803142013402256216
 zee/ 4/ 0.676537984365847889/ 0.573903236805416328
 
-mlr --irs crlf --implicit-csv-header --no-mmap --icsvlite --ifs , --opprint cut -x -f 2 reg_test/input/multi-sep.csv
+mlr --irs crlf --implicit-csv-header --no-mmap --icsvlite --ifs , --opprint cut -x -f 2 ./reg_test/input/multi-sep.csv
 1    3  4                     5
 a/   i/ x/                    y/
 wye/ 0/ 0.641593543645736508/ 0.262688053894177098
@@ -9412,7 +9553,7 @@ zee/ 2/ 0.923068348748175560/ 0.009737410587136359
 zee/ 3/ 0.000047786161325772/ 0.803142013402256216
 zee/ 4/ 0.676537984365847889/ 0.573903236805416328
 
-mlr --irs crlf --no-mmap --icsvlite --ifs /, --opprint cut -x -f b reg_test/input/multi-sep.csv
+mlr --irs crlf --no-mmap --icsvlite --ifs /, --opprint cut -x -f b ./reg_test/input/multi-sep.csv
 a   i x                    y/
 wye 0 0.641593543645736508 0.262688053894177098
 eks 1 0.827614412562742041 0.715431942006308552
@@ -9420,7 +9561,7 @@ zee 2 0.923068348748175560 0.009737410587136359
 zee 3 0.000047786161325772 0.803142013402256216
 zee 4 0.676537984365847889 0.573903236805416328
 
-mlr --irs crlf --implicit-csv-header --no-mmap --icsvlite --ifs /, --opprint cut -x -f 2 reg_test/input/multi-sep.csv
+mlr --irs crlf --implicit-csv-header --no-mmap --icsvlite --ifs /, --opprint cut -x -f 2 ./reg_test/input/multi-sep.csv
 1   3 4                    5
 a   i x                    y/
 wye 0 0.641593543645736508 0.262688053894177098
@@ -9429,7 +9570,7 @@ zee 2 0.923068348748175560 0.009737410587136359
 zee 3 0.000047786161325772 0.803142013402256216
 zee 4 0.676537984365847889 0.573903236805416328
 
-mlr --irs crlf --mmap --icsvlite --ifs , --opprint cut -x -f b/ reg_test/input/multi-sep.csv
+mlr --irs crlf --mmap --icsvlite --ifs , --opprint cut -x -f b/ ./reg_test/input/multi-sep.csv
 a/   i/ x/                    y/
 wye/ 0/ 0.641593543645736508/ 0.262688053894177098
 eks/ 1/ 0.827614412562742041/ 0.715431942006308552
@@ -9437,7 +9578,7 @@ zee/ 2/ 0.923068348748175560/ 0.009737410587136359
 zee/ 3/ 0.000047786161325772/ 0.803142013402256216
 zee/ 4/ 0.676537984365847889/ 0.573903236805416328
 
-mlr --irs crlf --implicit-csv-header --mmap --icsvlite --ifs , --opprint cut -x -f 2 reg_test/input/multi-sep.csv
+mlr --irs crlf --implicit-csv-header --mmap --icsvlite --ifs , --opprint cut -x -f 2 ./reg_test/input/multi-sep.csv
 1    3  4                     5
 a/   i/ x/                    y/
 wye/ 0/ 0.641593543645736508/ 0.262688053894177098
@@ -9446,7 +9587,7 @@ zee/ 2/ 0.923068348748175560/ 0.009737410587136359
 zee/ 3/ 0.000047786161325772/ 0.803142013402256216
 zee/ 4/ 0.676537984365847889/ 0.573903236805416328
 
-mlr --irs crlf --mmap --icsvlite --ifs /, --opprint cut -x -f b reg_test/input/multi-sep.csv
+mlr --irs crlf --mmap --icsvlite --ifs /, --opprint cut -x -f b ./reg_test/input/multi-sep.csv
 a   i x                    y/
 wye 0 0.641593543645736508 0.262688053894177098
 eks 1 0.827614412562742041 0.715431942006308552
@@ -9454,7 +9595,7 @@ zee 2 0.923068348748175560 0.009737410587136359
 zee 3 0.000047786161325772 0.803142013402256216
 zee 4 0.676537984365847889 0.573903236805416328
 
-mlr --irs crlf --implicit-csv-header --mmap --icsvlite --ifs /, --opprint cut -x -f 2 reg_test/input/multi-sep.csv
+mlr --irs crlf --implicit-csv-header --mmap --icsvlite --ifs /, --opprint cut -x -f 2 ./reg_test/input/multi-sep.csv
 1   3 4                    5
 a   i x                    y/
 wye 0 0.641593543645736508 0.262688053894177098
@@ -9463,7 +9604,7 @@ zee 2 0.923068348748175560 0.009737410587136359
 zee 3 0.000047786161325772 0.803142013402256216
 zee 4 0.676537984365847889 0.573903236805416328
 
-mlr --icsv --ifs , --opprint cut -x -f b/ reg_test/input/multi-sep.csv
+mlr --icsv --ifs , --opprint cut -x -f b/ ./reg_test/input/multi-sep.csv
 a/   i/ x/                    y/
 wye/ 0/ 0.641593543645736508/ 0.262688053894177098
 eks/ 1/ 0.827614412562742041/ 0.715431942006308552
@@ -9471,7 +9612,7 @@ zee/ 2/ 0.923068348748175560/ 0.009737410587136359
 zee/ 3/ 0.000047786161325772/ 0.803142013402256216
 zee/ 4/ 0.676537984365847889/ 0.573903236805416328
 
-mlr --implicit-csv-header --icsv --ifs , --opprint cut -x -f 2 reg_test/input/multi-sep.csv
+mlr --implicit-csv-header --icsv --ifs , --opprint cut -x -f 2 ./reg_test/input/multi-sep.csv
 1    3  4                     5
 a/   i/ x/                    y/
 wye/ 0/ 0.641593543645736508/ 0.262688053894177098
@@ -9480,7 +9621,7 @@ zee/ 2/ 0.923068348748175560/ 0.009737410587136359
 zee/ 3/ 0.000047786161325772/ 0.803142013402256216
 zee/ 4/ 0.676537984365847889/ 0.573903236805416328
 
-mlr --icsv --ifs /, --opprint cut -x -f b reg_test/input/multi-sep.csv
+mlr --icsv --ifs /, --opprint cut -x -f b ./reg_test/input/multi-sep.csv
 a   i x                    y/
 wye 0 0.641593543645736508 0.262688053894177098
 eks 1 0.827614412562742041 0.715431942006308552
@@ -9488,7 +9629,7 @@ zee 2 0.923068348748175560 0.009737410587136359
 zee 3 0.000047786161325772 0.803142013402256216
 zee 4 0.676537984365847889 0.573903236805416328
 
-mlr --implicit-csv-header --icsv --ifs /, --opprint cut -x -f 2 reg_test/input/multi-sep.csv
+mlr --implicit-csv-header --icsv --ifs /, --opprint cut -x -f 2 ./reg_test/input/multi-sep.csv
 1   3 4                    5
 a   i x                    y/
 wye 0 0.641593543645736508 0.262688053894177098
@@ -9501,41 +9642,41 @@ zee 4 0.676537984365847889 0.573903236805416328
 ================================================================
 HET-CSV INPUT
 
-mlr --icsvlite --odkvp cat reg_test/input/a.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/a.csv
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --icsvlite --odkvp cat reg_test/input/b.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/b.csv
 d=5,e=6,f=7
 
-mlr --icsvlite --odkvp cat reg_test/input/c.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/c.csv
 a=1,b=2,c=3
 a=4,b=5,c=6
 a=7,b=8,c=9
 
-mlr --icsvlite --odkvp cat reg_test/input/d.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/d.csv
 h=3,i=4,j=5
 m=8,n=9,o=10
 
-mlr --icsvlite --odkvp cat reg_test/input/e.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/e.csv
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --icsvlite --odkvp cat reg_test/input/f.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/f.csv
 
-mlr --icsvlite --odkvp cat reg_test/input/g.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/g.csv
 
-mlr --icsvlite --odkvp cat reg_test/input/a.csv reg_test/input/a.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/a.csv ./reg_test/input/a.csv
 a=1,b=2,c=3
 a=4,b=5,c=6
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --icsvlite --odkvp cat reg_test/input/b.csv reg_test/input/b.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/b.csv ./reg_test/input/b.csv
 d=5,e=6,f=7
 d=5,e=6,f=7
 
-mlr --icsvlite --odkvp cat reg_test/input/c.csv reg_test/input/c.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/c.csv ./reg_test/input/c.csv
 a=1,b=2,c=3
 a=4,b=5,c=6
 a=7,b=8,c=9
@@ -9543,53 +9684,53 @@ a=1,b=2,c=3
 a=4,b=5,c=6
 a=7,b=8,c=9
 
-mlr --icsvlite --odkvp cat reg_test/input/d.csv reg_test/input/d.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/d.csv ./reg_test/input/d.csv
 h=3,i=4,j=5
 m=8,n=9,o=10
 h=3,i=4,j=5
 m=8,n=9,o=10
 
-mlr --icsvlite --odkvp cat reg_test/input/e.csv reg_test/input/e.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/e.csv ./reg_test/input/e.csv
 a=1,b=2,c=3
 a=4,b=5,c=6
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --icsvlite --odkvp cat reg_test/input/f.csv reg_test/input/f.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/f.csv ./reg_test/input/f.csv
 
-mlr --icsvlite --odkvp cat reg_test/input/g.csv reg_test/input/g.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/g.csv ./reg_test/input/g.csv
 
-mlr --icsvlite --odkvp cat reg_test/input/a.csv reg_test/input/b.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/a.csv ./reg_test/input/b.csv
 a=1,b=2,c=3
 a=4,b=5,c=6
 d=5,e=6,f=7
 
-mlr --icsvlite --odkvp cat reg_test/input/b.csv reg_test/input/c.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/b.csv ./reg_test/input/c.csv
 d=5,e=6,f=7
 a=1,b=2,c=3
 a=4,b=5,c=6
 a=7,b=8,c=9
 
-mlr --icsvlite --odkvp cat reg_test/input/c.csv reg_test/input/d.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/c.csv ./reg_test/input/d.csv
 a=1,b=2,c=3
 a=4,b=5,c=6
 a=7,b=8,c=9
 h=3,i=4,j=5
 m=8,n=9,o=10
 
-mlr --icsvlite --odkvp cat reg_test/input/d.csv reg_test/input/e.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/d.csv ./reg_test/input/e.csv
 h=3,i=4,j=5
 m=8,n=9,o=10
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --icsvlite --odkvp cat reg_test/input/e.csv reg_test/input/f.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/e.csv ./reg_test/input/f.csv
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --icsvlite --odkvp cat reg_test/input/f.csv reg_test/input/g.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/f.csv ./reg_test/input/g.csv
 
-mlr --icsvlite --odkvp cat reg_test/input/a.csv reg_test/input/b.csv reg_test/input/c.csv reg_test/input/d.csv reg_test/input/e.csv reg_test/input/f.csv reg_test/input/g.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/a.csv ./reg_test/input/b.csv ./reg_test/input/c.csv ./reg_test/input/d.csv ./reg_test/input/e.csv ./reg_test/input/f.csv ./reg_test/input/g.csv
 a=1,b=2,c=3
 a=4,b=5,c=6
 d=5,e=6,f=7
@@ -9601,30 +9742,30 @@ m=8,n=9,o=10
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --icsvlite --odkvp tac reg_test/input/het.csv
+mlr --icsvlite --odkvp tac ./reg_test/input/het.csv
 resource=/some/other/path,loadsec=0.97,ok=false
 record_count=150,resource=/path/to/second/file
 resource=/path/to/second/file,loadsec=0.32,ok=true
 record_count=100,resource=/path/to/file
 resource=/path/to/file,loadsec=0.45,ok=true
 
-mlr --headerless-csv-output --csvlite tac reg_test/input/a.csv
+mlr --headerless-csv-output --csvlite tac ./reg_test/input/a.csv
 4,5,6
 1,2,3
 
-mlr --headerless-csv-output --csvlite tac reg_test/input/c.csv
+mlr --headerless-csv-output --csvlite tac ./reg_test/input/c.csv
 7,8,9
 4,5,6
 1,2,3
 
-mlr --headerless-csv-output --csvlite tac reg_test/input/a.csv reg_test/input/c.csv
+mlr --headerless-csv-output --csvlite tac ./reg_test/input/a.csv ./reg_test/input/c.csv
 7,8,9
 4,5,6
 1,2,3
 4,5,6
 1,2,3
 
-mlr --headerless-csv-output --csvlite tac reg_test/input/het.csv
+mlr --headerless-csv-output --csvlite tac ./reg_test/input/het.csv
 /some/other/path,0.97,false
 
 150,/path/to/second/file
@@ -9635,7 +9776,7 @@ mlr --headerless-csv-output --csvlite tac reg_test/input/het.csv
 
 /path/to/file,0.45,true
 
-mlr --headerless-csv-output --csvlite group-like reg_test/input/het.csv
+mlr --headerless-csv-output --csvlite group-like ./reg_test/input/het.csv
 /path/to/file,0.45,true
 /path/to/second/file,0.32,true
 /some/other/path,0.97,false
@@ -9647,41 +9788,41 @@ mlr --headerless-csv-output --csvlite group-like reg_test/input/het.csv
 ================================================================
 HET-PPRINT INPUT
 
-mlr --ipprint --odkvp cat reg_test/input/a.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/a.pprint
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --ipprint --odkvp cat reg_test/input/b.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/b.pprint
 d=5,e=6,f=7
 
-mlr --ipprint --odkvp cat reg_test/input/c.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/c.pprint
 a=1,b=2,c=3
 a=4,b=5,c=6
 a=7,b=8,c=9
 
-mlr --ipprint --odkvp cat reg_test/input/d.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/d.pprint
 h=3,i=4,j=5
 m=8,n=9,o=10
 
-mlr --ipprint --odkvp cat reg_test/input/e.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/e.pprint
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --ipprint --odkvp cat reg_test/input/f.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/f.pprint
 
-mlr --ipprint --odkvp cat reg_test/input/g.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/g.pprint
 
-mlr --ipprint --odkvp cat reg_test/input/a.pprint reg_test/input/a.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/a.pprint ./reg_test/input/a.pprint
 a=1,b=2,c=3
 a=4,b=5,c=6
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --ipprint --odkvp cat reg_test/input/b.pprint reg_test/input/b.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/b.pprint ./reg_test/input/b.pprint
 d=5,e=6,f=7
 d=5,e=6,f=7
 
-mlr --ipprint --odkvp cat reg_test/input/c.pprint reg_test/input/c.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/c.pprint ./reg_test/input/c.pprint
 a=1,b=2,c=3
 a=4,b=5,c=6
 a=7,b=8,c=9
@@ -9689,53 +9830,53 @@ a=1,b=2,c=3
 a=4,b=5,c=6
 a=7,b=8,c=9
 
-mlr --ipprint --odkvp cat reg_test/input/d.pprint reg_test/input/d.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/d.pprint ./reg_test/input/d.pprint
 h=3,i=4,j=5
 m=8,n=9,o=10
 h=3,i=4,j=5
 m=8,n=9,o=10
 
-mlr --ipprint --odkvp cat reg_test/input/e.pprint reg_test/input/e.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/e.pprint ./reg_test/input/e.pprint
 a=1,b=2,c=3
 a=4,b=5,c=6
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --ipprint --odkvp cat reg_test/input/f.pprint reg_test/input/f.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/f.pprint ./reg_test/input/f.pprint
 
-mlr --ipprint --odkvp cat reg_test/input/g.pprint reg_test/input/g.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/g.pprint ./reg_test/input/g.pprint
 
-mlr --ipprint --odkvp cat reg_test/input/a.pprint reg_test/input/b.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/a.pprint ./reg_test/input/b.pprint
 a=1,b=2,c=3
 a=4,b=5,c=6
 d=5,e=6,f=7
 
-mlr --ipprint --odkvp cat reg_test/input/b.pprint reg_test/input/c.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/b.pprint ./reg_test/input/c.pprint
 d=5,e=6,f=7
 a=1,b=2,c=3
 a=4,b=5,c=6
 a=7,b=8,c=9
 
-mlr --ipprint --odkvp cat reg_test/input/c.pprint reg_test/input/d.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/c.pprint ./reg_test/input/d.pprint
 a=1,b=2,c=3
 a=4,b=5,c=6
 a=7,b=8,c=9
 h=3,i=4,j=5
 m=8,n=9,o=10
 
-mlr --ipprint --odkvp cat reg_test/input/d.pprint reg_test/input/e.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/d.pprint ./reg_test/input/e.pprint
 h=3,i=4,j=5
 m=8,n=9,o=10
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --ipprint --odkvp cat reg_test/input/e.pprint reg_test/input/f.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/e.pprint ./reg_test/input/f.pprint
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --ipprint --odkvp cat reg_test/input/f.pprint reg_test/input/g.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/f.pprint ./reg_test/input/g.pprint
 
-mlr --ipprint --odkvp cat reg_test/input/a.pprint reg_test/input/b.pprint reg_test/input/c.pprint reg_test/input/d.pprint reg_test/input/e.pprint reg_test/input/f.pprint reg_test/input/g.pprint
+mlr --ipprint --odkvp cat ./reg_test/input/a.pprint ./reg_test/input/b.pprint ./reg_test/input/c.pprint ./reg_test/input/d.pprint ./reg_test/input/e.pprint ./reg_test/input/f.pprint ./reg_test/input/g.pprint
 a=1,b=2,c=3
 a=4,b=5,c=6
 d=5,e=6,f=7
@@ -9751,21 +9892,21 @@ a=4,b=5,c=6
 ================================================================
 NULL-FIELD INPUT
 
-mlr --icsvlite --odkvp cat reg_test/input/null-fields.csv
+mlr --icsvlite --odkvp cat ./reg_test/input/null-fields.csv
 a=1,b=2,c=3,d=4,e=5
 a=6,b=,c=,d=,e=10
 a=,b=,c=,d=11,e=12
 a=13,b=14,c=,d=,e=
 a=,b=,c=,d=,e=
 
-mlr --inidx --ifs comma --odkvp cat reg_test/input/null-fields.nidx
+mlr --inidx --ifs comma --odkvp cat ./reg_test/input/null-fields.nidx
 1=a,2=b,3=c,4=d,5=e
 1=f,2=,3=,4=,5=g
 1=,2=,3=,4=h,5=i
 1=j,2=k,3=,4=,5=
 1=,2=,3=,4=,5=
 
-mlr --idkvp --oxtab cat reg_test/input/missings.dkvp
+mlr --idkvp --oxtab cat ./reg_test/input/missings.dkvp
 a 1
 b 2
 c 3
@@ -9793,38 +9934,38 @@ f 6
 ================================================================
 SPACE-PADDING
 
-mlr --mmap --idkvp --odkvp --ifs space --repifs cat reg_test/input/space-pad.dkvp
+mlr --mmap --idkvp --odkvp --ifs space --repifs cat ./reg_test/input/space-pad.dkvp
 a=1,b=2
 c=3
 
-mlr --no-mmap --idkvp --odkvp --ifs space --repifs cat reg_test/input/space-pad.dkvp
+mlr --no-mmap --idkvp --odkvp --ifs space --repifs cat ./reg_test/input/space-pad.dkvp
 a=1,b=2
 c=3
 
-mlr --mmap --inidx --odkvp --ifs space --repifs cat reg_test/input/space-pad.nidx
+mlr --mmap --inidx --odkvp --ifs space --repifs cat ./reg_test/input/space-pad.nidx
 1=a,2=b,3=c
 1=d,2=e,3=f
 
-mlr --no-mmap --inidx --odkvp --ifs space --repifs cat reg_test/input/space-pad.nidx
+mlr --no-mmap --inidx --odkvp --ifs space --repifs cat ./reg_test/input/space-pad.nidx
 1=a,2=b,3=c
 1=d,2=e,3=f
 
-mlr --mmap --icsvlite --odkvp --ifs space --repifs cat reg_test/input/space-pad.pprint
+mlr --mmap --icsvlite --odkvp --ifs space --repifs cat ./reg_test/input/space-pad.pprint
 a=1,b=2,c=3
 
-mlr --no-mmap --icsvlite --odkvp --ifs space --repifs cat reg_test/input/space-pad.pprint
+mlr --no-mmap --icsvlite --odkvp --ifs space --repifs cat ./reg_test/input/space-pad.pprint
 a=1,b=2,c=3
 
 
 ================================================================
 DOUBLE PS
 
-mlr --no-mmap --opprint cat reg_test/input/double-ps.dkvp
+mlr --no-mmap --opprint cat ./reg_test/input/double-ps.dkvp
 a   b    c
 pan wy.e 3
 pan wy=e 3
 
-mlr --mmap --opprint cat reg_test/input/double-ps.dkvp
+mlr --mmap --opprint cat ./reg_test/input/double-ps.dkvp
 a   b    c
 pan wy.e 3
 pan wy=e 3
@@ -9833,47 +9974,47 @@ pan wy=e 3
 ================================================================
 MISSING FINAL LF
 
-mlr --no-mmap --csvlite cat reg_test/input/truncated.csv
+mlr --no-mmap --csvlite cat ./reg_test/input/truncated.csv
 a,b,c
 1,2,3
 4,5,6
 7,8,9
 
-mlr --csvlite cat reg_test/input/truncated.csv
+mlr --csvlite cat ./reg_test/input/truncated.csv
 a,b,c
 1,2,3
 4,5,6
 7,8,9
 
-mlr --no-mmap --dkvp cat reg_test/input/truncated.dkvp
+mlr --no-mmap --dkvp cat ./reg_test/input/truncated.dkvp
 a=1,b=2
 c=3
 
-mlr --dkvp cat reg_test/input/truncated.dkvp
+mlr --dkvp cat ./reg_test/input/truncated.dkvp
 a=1,b=2
 c=3
 
-mlr --no-mmap --nidx cat reg_test/input/truncated.nidx
+mlr --no-mmap --nidx cat ./reg_test/input/truncated.nidx
 1 2 3
 4 5
 
-mlr --nidx cat reg_test/input/truncated.nidx
+mlr --nidx cat ./reg_test/input/truncated.nidx
 1 2 3
 4 5
 
-mlr --no-mmap --pprint cat reg_test/input/truncated.pprint
+mlr --no-mmap --pprint cat ./reg_test/input/truncated.pprint
 a b c
 1 2 3
 4 5 6
 7 8 9
 
-mlr --pprint cat reg_test/input/truncated.pprint
+mlr --pprint cat ./reg_test/input/truncated.pprint
 a b c
 1 2 3
 4 5 6
 7 8 9
 
-mlr --no-mmap --xtab cat reg_test/input/truncated.xtab
+mlr --no-mmap --xtab cat ./reg_test/input/truncated.xtab
 a 1
 b 2
 c 3
@@ -9881,7 +10022,7 @@ c 3
 d 4
 e 5
 
-mlr --xtab cat reg_test/input/truncated.xtab
+mlr --xtab cat ./reg_test/input/truncated.xtab
 a 1
 b 2
 c 3
@@ -9893,39 +10034,39 @@ e 5
 ================================================================
 UTF-8 alignment
 
-mlr --icsvlite --opprint cat reg_test/input/utf8-1.csv
+mlr --icsvlite --opprint cat ./reg_test/input/utf8-1.csv
 langue   nom      jour
 français françois vendredi
 
-mlr --icsvlite --opprint cat reg_test/input/utf8-2.csv
+mlr --icsvlite --opprint cat ./reg_test/input/utf8-2.csv
 français françois vendredi
 langue   nom      jour
 
-mlr --icsvlite --oxtab cat reg_test/input/utf8-1.csv
+mlr --icsvlite --oxtab cat ./reg_test/input/utf8-1.csv
 langue français
 nom    françois
 jour   vendredi
 
-mlr --icsvlite --oxtab cat reg_test/input/utf8-2.csv
+mlr --icsvlite --oxtab cat ./reg_test/input/utf8-2.csv
 français langue
 françois nom
 vendredi jour
 
-mlr --inidx --ifs space --opprint cat reg_test/input/utf8-align.nidx
+mlr --inidx --ifs space --opprint cat ./reg_test/input/utf8-align.nidx
 1        2
 191º     test
 191      test2
 francois français
 françois francais
 
-mlr --inidx --ifs space --opprint --right cat reg_test/input/utf8-align.nidx
+mlr --inidx --ifs space --opprint --right cat ./reg_test/input/utf8-align.nidx
        1        2
     191º     test
      191    test2
 francois français
 françois francais
 
-mlr --oxtab cat reg_test/input/utf8-align.dkvp
+mlr --oxtab cat ./reg_test/input/utf8-align.dkvp
 191º test
 1912 test2
 cois çais
@@ -9941,7 +10082,7 @@ ois  çais
 coise çais
 çois  cais
 
-mlr --inidx --ifs space --oxtab --xvright cat reg_test/input/utf8-align.nidx
+mlr --inidx --ifs space --oxtab --xvright cat ./reg_test/input/utf8-align.nidx
 1 191º
 2 test
 
@@ -9958,7 +10099,7 @@ mlr --inidx --ifs space --oxtab --xvright cat reg_test/input/utf8-align.nidx
 ================================================================
 INT64 I/O
 
-mlr --oxtab put $c=$a;$d=$b;$e=hexfmt($a);$f=hexfmt($b) reg_test/input/int64io.dkvp
+mlr --oxtab put $c=$a;$d=$b;$e=hexfmt($a);$f=hexfmt($b) ./reg_test/input/int64io.dkvp
 a 0x1
 b 1
 c 1
@@ -9994,7 +10135,7 @@ d -1
 e 0xffffffffffffffff
 f 0xffffffffffffffff
 
-mlr --opprint put $p0=$p+0;$p1=$p+1;$p2=$p+2;$p3=$p+3 reg_test/input/int64arith.dkvp
+mlr --opprint put $p0=$p+0;$p1=$p+1;$p2=$p+2;$p3=$p+3 ./reg_test/input/int64arith.dkvp
 p                  n                  p0                  p1                         p2                         p3
 0x7ffffffffffff9ff 0x8000000000000000 9223372036854774271 9223372036854774272        9223372036854774273        9223372036854774274
 0x7ffffffffffffa00 0x8000000000000001 9223372036854774272 9223372036854774273        9223372036854774274        9223372036854774275
@@ -10005,7 +10146,7 @@ p                  n                  p0                  p1
 0x7ffffffffffffffe 0x8000000000000600 9223372036854775806 9223372036854775807        9223372036854775808.000000 9223372036854775808.000000
 0x7fffffffffffffff 0x8000000000000601 9223372036854775807 9223372036854775808.000000 9223372036854775808.000000 9223372036854775808.000000
 
-mlr --opprint put $p0=$p-0;$p1=$p-1;$p2=$p-2;$p3=$p-3 reg_test/input/int64arith.dkvp
+mlr --opprint put $p0=$p-0;$p1=$p-1;$p2=$p-2;$p3=$p-3 ./reg_test/input/int64arith.dkvp
 p                  n                  p0                  p1                  p2                  p3
 0x7ffffffffffff9ff 0x8000000000000000 9223372036854774271 9223372036854774270 9223372036854774269 9223372036854774268
 0x7ffffffffffffa00 0x8000000000000001 9223372036854774272 9223372036854774271 9223372036854774270 9223372036854774269
@@ -10016,7 +10157,7 @@ p                  n                  p0                  p1                  p2
 0x7ffffffffffffffe 0x8000000000000600 9223372036854775806 9223372036854775805 9223372036854775804 9223372036854775803
 0x7fffffffffffffff 0x8000000000000601 9223372036854775807 9223372036854775806 9223372036854775805 9223372036854775804
 
-mlr --opprint put $p0=$p*0;$p1=$p*1;$p2=$p*2;$p3=$p*3 reg_test/input/int64arith.dkvp
+mlr --opprint put $p0=$p*0;$p1=$p*1;$p2=$p*2;$p3=$p*3 ./reg_test/input/int64arith.dkvp
 p                  n                  p0 p1                         p2                          p3
 0x7ffffffffffff9ff 0x8000000000000000 0  9223372036854774271        18446744073709547520.000000 27670116110564319232.000000
 0x7ffffffffffffa00 0x8000000000000001 0  9223372036854774272        18446744073709547520.000000 27670116110564319232.000000
@@ -10027,7 +10168,7 @@ p                  n                  p0 p1                         p2
 0x7ffffffffffffffe 0x8000000000000600 0  9223372036854775808.000000 18446744073709551616.000000 27670116110564327424.000000
 0x7fffffffffffffff 0x8000000000000601 0  9223372036854775808.000000 18446744073709551616.000000 27670116110564327424.000000
 
-mlr --opprint put $n0=$n+0;$n1=$n+1;$n2=$n+2;$n3=$n+3 reg_test/input/int64arith.dkvp
+mlr --opprint put $n0=$n+0;$n1=$n+1;$n2=$n+2;$n3=$n+3 ./reg_test/input/int64arith.dkvp
 p                  n                  n0                   n1                   n2                   n3
 0x7ffffffffffff9ff 0x8000000000000000 -9223372036854775808 -9223372036854775807 -9223372036854775806 -9223372036854775805
 0x7ffffffffffffa00 0x8000000000000001 -9223372036854775807 -9223372036854775806 -9223372036854775805 -9223372036854775804
@@ -10038,7 +10179,7 @@ p                  n                  n0                   n1
 0x7ffffffffffffffe 0x8000000000000600 -9223372036854774272 -9223372036854774271 -9223372036854774270 -9223372036854774269
 0x7fffffffffffffff 0x8000000000000601 -9223372036854774271 -9223372036854774270 -9223372036854774269 -9223372036854774268
 
-mlr --opprint put $n0=$n-0;$n1=$n-1;$n2=$n-2;$n3=$n-3 reg_test/input/int64arith.dkvp
+mlr --opprint put $n0=$n-0;$n1=$n-1;$n2=$n-2;$n3=$n-3 ./reg_test/input/int64arith.dkvp
 p                  n                  n0                   n1                          n2                          n3
 0x7ffffffffffff9ff 0x8000000000000000 -9223372036854775808 -9223372036854775808.000000 -9223372036854775808.000000 -9223372036854775808.000000
 0x7ffffffffffffa00 0x8000000000000001 -9223372036854775807 -9223372036854775808        -9223372036854775808.000000 -9223372036854775808.000000
@@ -10049,7 +10190,7 @@ p                  n                  n0                   n1
 0x7ffffffffffffffe 0x8000000000000600 -9223372036854774272 -9223372036854774273        -9223372036854774274        -9223372036854774275
 0x7fffffffffffffff 0x8000000000000601 -9223372036854774271 -9223372036854774272        -9223372036854774273        -9223372036854774274
 
-mlr --opprint put $n0=$n*0;$n1=$n*1;$n2=$n*2;$n3=$n*3 reg_test/input/int64arith.dkvp
+mlr --opprint put $n0=$n*0;$n1=$n*1;$n2=$n*2;$n3=$n*3 ./reg_test/input/int64arith.dkvp
 p                  n                  n0 n1                          n2                           n3
 0x7ffffffffffff9ff 0x8000000000000000 0  -9223372036854775808.000000 -18446744073709551616.000000 -27670116110564327424.000000
 0x7ffffffffffffa00 0x8000000000000001 0  -9223372036854775808.000000 -18446744073709551616.000000 -27670116110564327424.000000
@@ -10074,54 +10215,54 @@ x,y"yy,z
 ================================================================
 RFC-CSV
 
-mlr --csv cat reg_test/input/rfc-csv/simple.csv
+mlr --csv cat ./reg_test/input/rfc-csv/simple.csv
 a,b,c
 1,x,3
 4,5,6
 x,y"yy,z
 
-mlr --csv cat reg_test/input/rfc-csv/simple-truncated.csv
+mlr --csv cat ./reg_test/input/rfc-csv/simple-truncated.csv
 a,b,c
 1,x,3
 4,5,6
 
-mlr --csv cat reg_test/input/rfc-csv/narrow.csv
+mlr --csv cat ./reg_test/input/rfc-csv/narrow.csv
 a
 1
 2
 3
 4
 
-mlr --csv cat reg_test/input/rfc-csv/narrow-truncated.csv
+mlr --csv cat ./reg_test/input/rfc-csv/narrow-truncated.csv
 a
 1
 2
 3
 4
 
-mlr --csv cat reg_test/input/rfc-csv/quoted-comma.csv
+mlr --csv cat ./reg_test/input/rfc-csv/quoted-comma.csv
 a,b,c
 1,"x,3",y
 4,5,6
 
-mlr --csv cat reg_test/input/rfc-csv/quoted-comma-truncated.csv
+mlr --csv cat ./reg_test/input/rfc-csv/quoted-comma-truncated.csv
 a,b,c
 1,"x,3",y
 4,5,6
 
-mlr --csv cat reg_test/input/rfc-csv/quoted-crlf.csv
+mlr --csv cat ./reg_test/input/rfc-csv/quoted-crlf.csv
 a,b,c
 1,"x
 3",y
 4,5,6
 
-mlr --csv cat reg_test/input/rfc-csv/quoted-crlf-truncated.csv
+mlr --csv cat ./reg_test/input/rfc-csv/quoted-crlf-truncated.csv
 a,b,c
 1,"x
 3",y
 4,5,6
 
-mlr --csv cat reg_test/input/rfc-csv/simple-truncated.csv reg_test/input/rfc-csv/simple.csv
+mlr --csv cat ./reg_test/input/rfc-csv/simple-truncated.csv ./reg_test/input/rfc-csv/simple.csv
 a,b,c
 1,x,3
 4,5,6
@@ -10129,7 +10270,7 @@ a,b,c
 4,5,6
 x,y"yy,z
 
-mlr --csv --ifs semicolon --ofs pipe --irs lf --ors lflf cut -x -f b reg_test/input/rfc-csv/modify-defaults.csv
+mlr --csv --ifs semicolon --ofs pipe --irs lf --ors lflf cut -x -f b ./reg_test/input/rfc-csv/modify-defaults.csv
 a|c
 
 1|3
@@ -10141,7 +10282,7 @@ a|c
 ================================================================
 MULTI-CHARACTER IRS/IFS/IPS FOR DKVP
 
-mlr --oxtab --idkvp --mmap --irs lf --ifs , --ips = cut -o -f x,a,i reg_test/input/multi-sep.dkvp
+mlr --oxtab --idkvp --mmap --irs lf --ifs , --ips = cut -o -f x,a,i ./reg_test/input/multi-sep.dkvp
 x :0.641593543645736508/
 a :wye/
 i :0/
@@ -10162,7 +10303,7 @@ x :0.676537984365847889/
 a :zee/
 i :4/
 
-mlr --oxtab --idkvp --mmap --irs lf --ifs /, --ips =: cut -o -f x,a,i reg_test/input/multi-sep.dkvp
+mlr --oxtab --idkvp --mmap --irs lf --ifs /, --ips =: cut -o -f x,a,i ./reg_test/input/multi-sep.dkvp
 x 0.641593543645736508
 a wye
 i 0
@@ -10183,7 +10324,7 @@ x 0.676537984365847889
 a zee
 i 4
 
-mlr --oxtab --idkvp --mmap --irs crlf --ifs , --ips = cut -o -f x,a,i reg_test/input/multi-sep.dkvp
+mlr --oxtab --idkvp --mmap --irs crlf --ifs , --ips = cut -o -f x,a,i ./reg_test/input/multi-sep.dkvp
 x :0.641593543645736508/
 a :wye/
 i :0/
@@ -10204,7 +10345,7 @@ x :0.676537984365847889/
 a :zee/
 i :4/
 
-mlr --oxtab --idkvp --mmap --irs crlf --ifs /, --ips =: cut -o -f x,a,i reg_test/input/multi-sep.dkvp
+mlr --oxtab --idkvp --mmap --irs crlf --ifs /, --ips =: cut -o -f x,a,i ./reg_test/input/multi-sep.dkvp
 x 0.641593543645736508
 a wye
 i 0
@@ -10225,7 +10366,7 @@ x 0.676537984365847889
 a zee
 i 4
 
-mlr --oxtab --no-mmap --irs lf --ifs , --ips = cut -o -f x,a,i reg_test/input/multi-sep.dkvp
+mlr --oxtab --no-mmap --irs lf --ifs , --ips = cut -o -f x,a,i ./reg_test/input/multi-sep.dkvp
 x :0.641593543645736508/
 a :wye/
 i :0/
@@ -10246,7 +10387,7 @@ x :0.676537984365847889/
 a :zee/
 i :4/
 
-mlr --oxtab --no-mmap --irs lf --ifs /, --ips =: cut -o -f x,a,i reg_test/input/multi-sep.dkvp
+mlr --oxtab --no-mmap --irs lf --ifs /, --ips =: cut -o -f x,a,i ./reg_test/input/multi-sep.dkvp
 x 0.641593543645736508
 a wye
 i 0
@@ -10267,7 +10408,7 @@ x 0.676537984365847889
 a zee
 i 4
 
-mlr --oxtab --no-mmap --irs crlf --ifs , --ips = cut -o -f x,a,i reg_test/input/multi-sep.dkvp
+mlr --oxtab --no-mmap --irs crlf --ifs , --ips = cut -o -f x,a,i ./reg_test/input/multi-sep.dkvp
 x :0.641593543645736508/
 a :wye/
 i :0/
@@ -10288,7 +10429,7 @@ x :0.676537984365847889/
 a :zee/
 i :4/
 
-mlr --oxtab --no-mmap --irs crlf --ifs /, --ips =: cut -o -f x,a,i reg_test/input/multi-sep.dkvp
+mlr --oxtab --no-mmap --irs crlf --ifs /, --ips =: cut -o -f x,a,i ./reg_test/input/multi-sep.dkvp
 x 0.641593543645736508
 a wye
 i 0
@@ -10313,7 +10454,7 @@ i 4
 ================================================================
 MULTI-CHARACTER IRS/IFS FOR NIDX
 
-mlr --oxtab --inidx --mmap --irs lf --ifs , cut -o -f 4,1,3 reg_test/input/multi-sep.dkvp
+mlr --oxtab --inidx --mmap --irs lf --ifs , cut -o -f 4,1,3 ./reg_test/input/multi-sep.dkvp
 4 x=:0.641593543645736508/
 1 a=:wye/
 3 i=:0/
@@ -10334,7 +10475,7 @@ mlr --oxtab --inidx --mmap --irs lf --ifs , cut -o -f 4,1,3 reg_test/input/multi
 1 a=:zee/
 3 i=:4/
 
-mlr --oxtab --inidx --mmap --irs lf --ifs /, cut -o -f 4,1,3 reg_test/input/multi-sep.dkvp
+mlr --oxtab --inidx --mmap --irs lf --ifs /, cut -o -f 4,1,3 ./reg_test/input/multi-sep.dkvp
 4 x=:0.641593543645736508
 1 a=:wye
 3 i=:0
@@ -10355,7 +10496,7 @@ mlr --oxtab --inidx --mmap --irs lf --ifs /, cut -o -f 4,1,3 reg_test/input/mult
 1 a=:zee
 3 i=:4
 
-mlr --oxtab --inidx --mmap --irs crlf --ifs , cut -o -f 4,1,3 reg_test/input/multi-sep.dkvp
+mlr --oxtab --inidx --mmap --irs crlf --ifs , cut -o -f 4,1,3 ./reg_test/input/multi-sep.dkvp
 4 x=:0.641593543645736508/
 1 a=:wye/
 3 i=:0/
@@ -10376,7 +10517,7 @@ mlr --oxtab --inidx --mmap --irs crlf --ifs , cut -o -f 4,1,3 reg_test/input/mul
 1 a=:zee/
 3 i=:4/
 
-mlr --oxtab --inidx --mmap --irs crlf --ifs /, cut -o -f 4,1,3 reg_test/input/multi-sep.dkvp
+mlr --oxtab --inidx --mmap --irs crlf --ifs /, cut -o -f 4,1,3 ./reg_test/input/multi-sep.dkvp
 4 x=:0.641593543645736508
 1 a=:wye
 3 i=:0
@@ -10397,7 +10538,7 @@ mlr --oxtab --inidx --mmap --irs crlf --ifs /, cut -o -f 4,1,3 reg_test/input/mu
 1 a=:zee
 3 i=:4
 
-mlr --oxtab --inidx --no-mmap --irs lf --ifs , cut -o -f 4,1,3 reg_test/input/multi-sep.dkvp
+mlr --oxtab --inidx --no-mmap --irs lf --ifs , cut -o -f 4,1,3 ./reg_test/input/multi-sep.dkvp
 4 x=:0.641593543645736508/
 1 a=:wye/
 3 i=:0/
@@ -10418,7 +10559,7 @@ mlr --oxtab --inidx --no-mmap --irs lf --ifs , cut -o -f 4,1,3 reg_test/input/mu
 1 a=:zee/
 3 i=:4/
 
-mlr --oxtab --inidx --no-mmap --irs lf --ifs /, cut -o -f 4,1,3 reg_test/input/multi-sep.dkvp
+mlr --oxtab --inidx --no-mmap --irs lf --ifs /, cut -o -f 4,1,3 ./reg_test/input/multi-sep.dkvp
 4 x=:0.641593543645736508
 1 a=:wye
 3 i=:0
@@ -10439,7 +10580,7 @@ mlr --oxtab --inidx --no-mmap --irs lf --ifs /, cut -o -f 4,1,3 reg_test/input/m
 1 a=:zee
 3 i=:4
 
-mlr --oxtab --inidx --no-mmap --irs crlf --ifs , cut -o -f 4,1,3 reg_test/input/multi-sep.dkvp
+mlr --oxtab --inidx --no-mmap --irs crlf --ifs , cut -o -f 4,1,3 ./reg_test/input/multi-sep.dkvp
 4 x=:0.641593543645736508/
 1 a=:wye/
 3 i=:0/
@@ -10460,7 +10601,7 @@ mlr --oxtab --inidx --no-mmap --irs crlf --ifs , cut -o -f 4,1,3 reg_test/input/
 1 a=:zee/
 3 i=:4/
 
-mlr --oxtab --inidx --no-mmap --irs crlf --ifs /, cut -o -f 4,1,3 reg_test/input/multi-sep.dkvp
+mlr --oxtab --inidx --no-mmap --irs crlf --ifs /, cut -o -f 4,1,3 ./reg_test/input/multi-sep.dkvp
 4 x=:0.641593543645736508
 1 a=:wye
 3 i=:0
@@ -10485,7 +10626,7 @@ mlr --oxtab --inidx --no-mmap --irs crlf --ifs /, cut -o -f 4,1,3 reg_test/input
 ================================================================
 MULTI-CHARACTER IRS/IFS FOR CSVLITE
 
-mlr --oxtab --icsvlite --mmap --irs lf --ifs , cut -o -f x/,a/,i/ reg_test/input/multi-sep.csv
+mlr --oxtab --icsvlite --mmap --irs lf --ifs , cut -o -f x/,a/,i/ ./reg_test/input/multi-sep.csv
 x/ 0.641593543645736508/
 a/ wye/
 i/ 0/
@@ -10506,7 +10647,7 @@ x/ 0.676537984365847889/
 a/ zee/
 i/ 4/
 
-mlr --oxtab --icsvlite --mmap --irs lf --ifs /, cut -o -f x,a,i reg_test/input/multi-sep.csv
+mlr --oxtab --icsvlite --mmap --irs lf --ifs /, cut -o -f x,a,i ./reg_test/input/multi-sep.csv
 x 0.641593543645736508
 a wye
 i 0
@@ -10527,7 +10668,7 @@ x 0.676537984365847889
 a zee
 i 4
 
-mlr --oxtab --icsvlite --mmap --irs crlf --ifs , cut -o -f x/,a/,i/ reg_test/input/multi-sep.csv
+mlr --oxtab --icsvlite --mmap --irs crlf --ifs , cut -o -f x/,a/,i/ ./reg_test/input/multi-sep.csv
 x/ 0.641593543645736508/
 a/ wye/
 i/ 0/
@@ -10548,7 +10689,7 @@ x/ 0.676537984365847889/
 a/ zee/
 i/ 4/
 
-mlr --oxtab --icsvlite --mmap --irs crlf --ifs /, cut -o -f x,a,i reg_test/input/multi-sep.csv
+mlr --oxtab --icsvlite --mmap --irs crlf --ifs /, cut -o -f x,a,i ./reg_test/input/multi-sep.csv
 x 0.641593543645736508
 a wye
 i 0
@@ -10569,7 +10710,7 @@ x 0.676537984365847889
 a zee
 i 4
 
-mlr --oxtab --icsvlite --no-mmap --irs lf --ifs , cut -o -f x/,a/,i/ reg_test/input/multi-sep.csv
+mlr --oxtab --icsvlite --no-mmap --irs lf --ifs , cut -o -f x/,a/,i/ ./reg_test/input/multi-sep.csv
 x/ 0.641593543645736508/
 a/ wye/
 i/ 0/
@@ -10590,7 +10731,7 @@ x/ 0.676537984365847889/
 a/ zee/
 i/ 4/
 
-mlr --oxtab --icsvlite --no-mmap --irs lf --ifs /, cut -o -f x,a,i reg_test/input/multi-sep.csv
+mlr --oxtab --icsvlite --no-mmap --irs lf --ifs /, cut -o -f x,a,i ./reg_test/input/multi-sep.csv
 x 0.641593543645736508
 a wye
 i 0
@@ -10611,7 +10752,7 @@ x 0.676537984365847889
 a zee
 i 4
 
-mlr --oxtab --icsvlite --no-mmap --irs crlf --ifs , cut -o -f x/,a/,i/ reg_test/input/multi-sep.csv
+mlr --oxtab --icsvlite --no-mmap --irs crlf --ifs , cut -o -f x/,a/,i/ ./reg_test/input/multi-sep.csv
 x/ 0.641593543645736508/
 a/ wye/
 i/ 0/
@@ -10632,7 +10773,7 @@ x/ 0.676537984365847889/
 a/ zee/
 i/ 4/
 
-mlr --oxtab --icsvlite --no-mmap --irs crlf --ifs /, cut -o -f x,a,i reg_test/input/multi-sep.csv
+mlr --oxtab --icsvlite --no-mmap --irs crlf --ifs /, cut -o -f x,a,i ./reg_test/input/multi-sep.csv
 x 0.641593543645736508
 a wye
 i 0
@@ -10657,32 +10798,32 @@ i 4
 ================================================================
 MULTI-CHARACTER SEPARATORS FOR XTAB
 
-mlr --mmap --xtab --ifs crlf --ofs Z cut -x -f b reg_test/input/truncated.xtab-crlf
+mlr --mmap --xtab --ifs crlf --ofs Z cut -x -f b ./reg_test/input/truncated.xtab-crlf
 a 1Zc 3ZZd 4Ze 5Z
-mlr --no-mmap --xtab --ifs crlf --ofs Z cut -x -f b reg_test/input/truncated.xtab-crlf
+mlr --no-mmap --xtab --ifs crlf --ofs Z cut -x -f b ./reg_test/input/truncated.xtab-crlf
 a 1Zc 3ZZd 4Ze 5Z
-mlr --mmap --xtab --ips . --ops @ cut -x -f b reg_test/input/dots.xtab
+mlr --mmap --xtab --ips . --ops @ cut -x -f b ./reg_test/input/dots.xtab
 a@1
 c@345
 
 defg@6
 hi@@@78
 
-mlr --no-mmap --xtab --ips . --ops @ cut -x -f b reg_test/input/dots.xtab
+mlr --no-mmap --xtab --ips . --ops @ cut -x -f b ./reg_test/input/dots.xtab
 a@1
 c@345
 
 defg@6
 hi@@@78
 
-mlr --no-mmap --xtab --ips . --ops := cut -x -f b reg_test/input/dots.xtab
+mlr --no-mmap --xtab --ips . --ops := cut -x -f b ./reg_test/input/dots.xtab
 a:=1
 c:=345
 
 defg:=6
 hi:=78
 
-mlr --xtab --ips :  --ops @@@@ put $sum=int($a+$b) reg_test/input/multi-ips.dkvp
+mlr --xtab --ips :  --ops @@@@ put $sum=int($a+$b) ./reg_test/input/multi-ips.dkvp
 a@@@@1
 b@@@@2
 sum@@@@3
@@ -10691,7 +10832,7 @@ sum@@@@3
 ================================================================
 MULTI-CHARACTER IRS FOR PPRINT
 
-mlr --mmap --pprint --irs crlf --ifs / --ofs @ cut -x -f b reg_test/input/dots.pprint
+mlr --mmap --pprint --irs crlf --ifs / --ofs @ cut -x -f b ./reg_test/input/dots.pprint
 a@@@i@@x@@@@@@@@@@@@@@@@@@@y
 pan@1@@0.3467901443380824@@0.7268028627434533
 eks@2@@0.7586799647899636@@0.5221511083334797
@@ -10704,7 +10845,7 @@ zee@8@@0.5985540091064224@@0.976181385699006
 hat@9@@0.03144187646093577@0.7495507603507059
 pan@10@0.5026260055412137@@0.9526183602969864
 
-mlr --no-mmap --pprint --irs crlf --ifs / --ofs @ cut -x -f b reg_test/input/dots.pprint
+mlr --no-mmap --pprint --irs crlf --ifs / --ofs @ cut -x -f b ./reg_test/input/dots.pprint
 a@@@i@@x@@@@@@@@@@@@@@@@@@@y
 pan@1@@0.3467901443380824@@0.7268028627434533
 eks@2@@0.7586799647899636@@0.5221511083334797
@@ -10721,7 +10862,7 @@ pan@10@0.5026260055412137@@0.9526183602969864
 ================================================================
 MULTI-CHARACTER IXS SPECIFIERS
 
-mlr --oxtab --idkvp --mmap --irs lf --ifs , --ips = cut -o -f x,a,i reg_test/input/multi-sep.dkvp
+mlr --oxtab --idkvp --mmap --irs lf --ifs , --ips = cut -o -f x,a,i ./reg_test/input/multi-sep.dkvp
 x :0.641593543645736508/
 a :wye/
 i :0/
@@ -10742,7 +10883,7 @@ x :0.676537984365847889/
 a :zee/
 i :4/
 
-mlr --oxtab --idkvp --mmap --irs lf --ifs /, --ips =: cut -o -f x,a,i reg_test/input/multi-sep.dkvp
+mlr --oxtab --idkvp --mmap --irs lf --ifs /, --ips =: cut -o -f x,a,i ./reg_test/input/multi-sep.dkvp
 x 0.641593543645736508
 a wye
 i 0