diff --git a/.gitignore b/.gitignore
index 3c1a41203..e7bb580e0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,6 +33,7 @@ test_parse_trie
 test_peek_file_reader
 test_string_builder
 output-regtest
+output-reg-test
 termcvt
 a.out
 *.dSYM
diff --git a/go/accept-case b/go/accept-case
index d47f1d701..a5996aee9 100755
--- a/go/accept-case
+++ b/go/accept-case
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 for arg; do
-  src=output-regtest/$arg.out
+  src=output-reg-test/$arg.out
   if [ ! -f $src ]; then
     echo "Cannot find source $src" 1>&2
     exit 1
diff --git a/go/reg-test/expected/case-c-dsl-redirects.sh.out b/go/reg-test/expected/case-c-dsl-redirects.sh.out
index 85b2747eb..dea29e72c 100644
--- a/go/reg-test/expected/case-c-dsl-redirects.sh.out
+++ b/go/reg-test/expected/case-c-dsl-redirects.sh.out
@@ -3,9 +3,9 @@
 ================================================================
 MAPPER TEE REDIRECTS
 
-mlr --from ././reg-test/input/abixy tee ./output-regtest/tee1/out then nothing
+mlr --from ././reg-test/input/abixy tee ./output-reg-test/tee1/out then nothing
 
-cat ./output-regtest/tee1/out
+cat ./output-reg-test/tee1/out
 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
@@ -17,9 +17,9 @@ 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 --from ././reg-test/input/abixy tee --no-fflush ./output-regtest/tee1/out then nothing
+mlr --from ././reg-test/input/abixy tee --no-fflush ./output-reg-test/tee1/out then nothing
 
-cat ./output-regtest/tee1/out
+cat ./output-reg-test/tee1/out
 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
@@ -31,9 +31,9 @@ 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 --from ././reg-test/input/abixy tee -a ./output-regtest/tee1/out then nothing
+mlr --from ././reg-test/input/abixy tee -a ./output-reg-test/tee1/out then nothing
 
-cat ./output-regtest/tee1/out
+cat ./output-reg-test/tee1/out
 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
@@ -55,9 +55,9 @@ 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 --from ././reg-test/input/abixy tee -o json ./output-regtest/tee1/out then nothing
+mlr --from ././reg-test/input/abixy tee -o json ./output-reg-test/tee1/out then nothing
 
-cat ./output-regtest/tee1/out
+cat ./output-reg-test/tee1/out
 { "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 }
@@ -73,53 +73,53 @@ cat ./output-regtest/tee1/out
 ================================================================
 DSL TEE REDIRECTS
 
-mlr put -q tee > "./output-regtest/tee2/out.".$a, $* ././reg-test/input/abixy
+mlr put -q tee > "./output-reg-test/tee2/out.".$a, $* ././reg-test/input/abixy
 
-cat ./output-regtest/tee2/out.eks
+cat ./output-reg-test/tee2/out.eks
 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
 
-cat ./output-regtest/tee2/out.hat
+cat ./output-reg-test/tee2/out.hat
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 
-cat ./output-regtest/tee2/out.pan
+cat ./output-reg-test/tee2/out.pan
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-cat ./output-regtest/tee2/out.wye
+cat ./output-reg-test/tee2/out.wye
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=wye,b=pan,i=5,x=0.5732889198020006,y=0.8636244699032729
 
-cat ./output-regtest/tee2/out.zee
+cat ./output-reg-test/tee2/out.zee
 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 put -q --no-fflush tee > "./output-regtest/tee2/out.".$a, $* ././reg-test/input/abixy
+mlr put -q --no-fflush tee > "./output-reg-test/tee2/out.".$a, $* ././reg-test/input/abixy
 
-cat ./output-regtest/tee2/out.eks
+cat ./output-reg-test/tee2/out.eks
 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
 
-cat ./output-regtest/tee2/out.hat
+cat ./output-reg-test/tee2/out.hat
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 
-cat ./output-regtest/tee2/out.pan
+cat ./output-reg-test/tee2/out.pan
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-cat ./output-regtest/tee2/out.wye
+cat ./output-reg-test/tee2/out.wye
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=wye,b=pan,i=5,x=0.5732889198020006,y=0.8636244699032729
 
-cat ./output-regtest/tee2/out.zee
+cat ./output-reg-test/tee2/out.zee
 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 put -q tee >> "./output-regtest/tee2/out.".$a, $* ././reg-test/input/abixy
+mlr put -q tee >> "./output-reg-test/tee2/out.".$a, $* ././reg-test/input/abixy
 
-cat ./output-regtest/tee2/out.eks
+cat ./output-reg-test/tee2/out.eks
 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
@@ -127,47 +127,47 @@ 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
 
-cat ./output-regtest/tee2/out.hat
+cat ./output-reg-test/tee2/out.hat
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 a=hat,b=wye,i=9,x=0.03144187646093577,y=0.7495507603507059
 
-cat ./output-regtest/tee2/out.pan
+cat ./output-reg-test/tee2/out.pan
 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=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
 
-cat ./output-regtest/tee2/out.wye
+cat ./output-reg-test/tee2/out.wye
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=wye,b=pan,i=5,x=0.5732889198020006,y=0.8636244699032729
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=wye,b=pan,i=5,x=0.5732889198020006,y=0.8636244699032729
 
-cat ./output-regtest/tee2/out.zee
+cat ./output-reg-test/tee2/out.zee
 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=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
 a=zee,b=wye,i=8,x=0.5985540091064224,y=0.976181385699006
 
-mlr put -q -o json tee > "./output-regtest/tee2/out.".$a, $* ././reg-test/input/abixy
+mlr put -q -o json tee > "./output-reg-test/tee2/out.".$a, $* ././reg-test/input/abixy
 
-cat ./output-regtest/tee2/out.eks
+cat ./output-reg-test/tee2/out.eks
 { "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 }
 
-cat ./output-regtest/tee2/out.hat
+cat ./output-reg-test/tee2/out.hat
 { "a": "hat", "b": "wye", "i": 9, "x": 0.03144187646093577, "y": 0.7495507603507059 }
 
-cat ./output-regtest/tee2/out.pan
+cat ./output-reg-test/tee2/out.pan
 { "a": "pan", "b": "pan", "i": 1, "x": 0.3467901443380824, "y": 0.7268028627434533 }
 { "a": "pan", "b": "wye", "i": 10, "x": 0.5026260055412137, "y": 0.9526183602969864 }
 
-cat ./output-regtest/tee2/out.wye
+cat ./output-reg-test/tee2/out.wye
 { "a": "wye", "b": "wye", "i": 3, "x": 0.20460330576630303, "y": 0.33831852551664776 }
 { "a": "wye", "b": "pan", "i": 5, "x": 0.5732889198020006, "y": 0.8636244699032729 }
 
-cat ./output-regtest/tee2/out.zee
+cat ./output-reg-test/tee2/out.zee
 { "a": "zee", "b": "pan", "i": 6, "x": 0.5271261600918548, "y": 0.49322128674835697 }
 { "a": "zee", "b": "wye", "i": 8, "x": 0.5985540091064224, "y": 0.976181385699006 }
 
@@ -207,63 +207,63 @@ 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
 
-cat ./output-regtest/tee2/err1
+cat ./output-reg-test/tee2/err1
 
 mlr put -q tee > stderr, $* ././reg-test/input/abixy
 
-cat ./output-regtest/tee2/err2
+cat ./output-reg-test/tee2/err2
 
 
 ================================================================
 DSL PRINT REDIRECTS
 
-mlr put -q print > "./output-regtest/print1/out.".$a, "abi:".$a.$b.$i ././reg-test/input/abixy
+mlr put -q print > "./output-reg-test/print1/out.".$a, "abi:".$a.$b.$i ././reg-test/input/abixy
 
-cat ./output-regtest/print1/out.eks
+cat ./output-reg-test/print1/out.eks
 abi:ekspan2
 abi:ekswye4
 abi:ekszee7
 
-cat ./output-regtest/print1/out.hat
+cat ./output-reg-test/print1/out.hat
 abi:hatwye9
 
-cat ./output-regtest/print1/out.pan
+cat ./output-reg-test/print1/out.pan
 abi:panpan1
 abi:panwye10
 
-cat ./output-regtest/print1/out.wye
+cat ./output-reg-test/print1/out.wye
 abi:wyewye3
 abi:wyepan5
 
-cat ./output-regtest/print1/out.zee
+cat ./output-reg-test/print1/out.zee
 abi:zeepan6
 abi:zeewye8
 
-mlr put -q print > "./output-regtest/print1/out.".$a, "abi:".$a.$b.$i ././reg-test/input/abixy
+mlr put -q print > "./output-reg-test/print1/out.".$a, "abi:".$a.$b.$i ././reg-test/input/abixy
 
-cat ./output-regtest/print1/out.eks
+cat ./output-reg-test/print1/out.eks
 abi:ekspan2
 abi:ekswye4
 abi:ekszee7
 
-cat ./output-regtest/print1/out.hat
+cat ./output-reg-test/print1/out.hat
 abi:hatwye9
 
-cat ./output-regtest/print1/out.pan
+cat ./output-reg-test/print1/out.pan
 abi:panpan1
 abi:panwye10
 
-cat ./output-regtest/print1/out.wye
+cat ./output-reg-test/print1/out.wye
 abi:wyewye3
 abi:wyepan5
 
-cat ./output-regtest/print1/out.zee
+cat ./output-reg-test/print1/out.zee
 abi:zeepan6
 abi:zeewye8
 
-mlr put -q print >> "./output-regtest/print1/out.".$a, "abi:".$a.$b.$i ././reg-test/input/abixy
+mlr put -q print >> "./output-reg-test/print1/out.".$a, "abi:".$a.$b.$i ././reg-test/input/abixy
 
-cat ./output-regtest/print1/out.eks
+cat ./output-reg-test/print1/out.eks
 abi:ekspan2
 abi:ekswye4
 abi:ekszee7
@@ -271,23 +271,23 @@ abi:ekspan2
 abi:ekswye4
 abi:ekszee7
 
-cat ./output-regtest/print1/out.hat
+cat ./output-reg-test/print1/out.hat
 abi:hatwye9
 abi:hatwye9
 
-cat ./output-regtest/print1/out.pan
+cat ./output-reg-test/print1/out.pan
 abi:panpan1
 abi:panwye10
 abi:panpan1
 abi:panwye10
 
-cat ./output-regtest/print1/out.wye
+cat ./output-reg-test/print1/out.wye
 abi:wyewye3
 abi:wyepan5
 abi:wyewye3
 abi:wyepan5
 
-cat ./output-regtest/print1/out.zee
+cat ./output-reg-test/print1/out.zee
 abi:zeepan6
 abi:zeewye8
 abi:zeepan6
@@ -317,69 +317,69 @@ abi:zeewye8
 abi:hatwye9
 abi:panwye10
 
-cat ./output-regtest/print1/err1
+cat ./output-reg-test/print1/err1
 
 mlr put -q print > stderr, "abi:".$a.$b.$i ././reg-test/input/abixy
 
-cat ./output-regtest/print1/err2
+cat ./output-reg-test/print1/err2
 
 
 ================================================================
 DSL PRINTN REDIRECTS
 
-mlr put -q printn > "./output-regtest/printn1/out.".$a, "abi:".$a.$b.$i ././reg-test/input/abixy
+mlr put -q printn > "./output-reg-test/printn1/out.".$a, "abi:".$a.$b.$i ././reg-test/input/abixy
 
-cat ./output-regtest/printn1/out.eks
+cat ./output-reg-test/printn1/out.eks
 abi:ekspan2abi:ekswye4abi:ekszee7
-cat ./output-regtest/printn1/out.hat
+cat ./output-reg-test/printn1/out.hat
 abi:hatwye9
-cat ./output-regtest/printn1/out.pan
+cat ./output-reg-test/printn1/out.pan
 abi:panpan1abi:panwye10
-cat ./output-regtest/printn1/out.wye
+cat ./output-reg-test/printn1/out.wye
 abi:wyewye3abi:wyepan5
-cat ./output-regtest/printn1/out.zee
+cat ./output-reg-test/printn1/out.zee
 abi:zeepan6abi:zeewye8
-mlr put -q printn > "./output-regtest/printn1/out.".$a, "abi:".$a.$b.$i ././reg-test/input/abixy
+mlr put -q printn > "./output-reg-test/printn1/out.".$a, "abi:".$a.$b.$i ././reg-test/input/abixy
 
-cat ./output-regtest/printn1/out.eks
+cat ./output-reg-test/printn1/out.eks
 abi:ekspan2abi:ekswye4abi:ekszee7
-cat ./output-regtest/printn1/out.hat
+cat ./output-reg-test/printn1/out.hat
 abi:hatwye9
-cat ./output-regtest/printn1/out.pan
+cat ./output-reg-test/printn1/out.pan
 abi:panpan1abi:panwye10
-cat ./output-regtest/printn1/out.wye
+cat ./output-reg-test/printn1/out.wye
 abi:wyewye3abi:wyepan5
-cat ./output-regtest/printn1/out.zee
+cat ./output-reg-test/printn1/out.zee
 abi:zeepan6abi:zeewye8
-mlr put -q printn >> "./output-regtest/printn1/out.".$a, "abi:".$a.$b.$i ././reg-test/input/abixy
+mlr put -q printn >> "./output-reg-test/printn1/out.".$a, "abi:".$a.$b.$i ././reg-test/input/abixy
 
-cat ./output-regtest/printn1/out.eks
+cat ./output-reg-test/printn1/out.eks
 abi:ekspan2abi:ekswye4abi:ekszee7abi:ekspan2abi:ekswye4abi:ekszee7
-cat ./output-regtest/printn1/out.hat
+cat ./output-reg-test/printn1/out.hat
 abi:hatwye9abi:hatwye9
-cat ./output-regtest/printn1/out.pan
+cat ./output-reg-test/printn1/out.pan
 abi:panpan1abi:panwye10abi:panpan1abi:panwye10
-cat ./output-regtest/printn1/out.wye
+cat ./output-reg-test/printn1/out.wye
 abi:wyewye3abi:wyepan5abi:wyewye3abi:wyepan5
-cat ./output-regtest/printn1/out.zee
+cat ./output-reg-test/printn1/out.zee
 abi:zeepan6abi:zeewye8abi:zeepan6abi:zeewye8
 mlr put -q printn | "tr \[a-z\] \[A-Z\]",  "abi:".$a.$b.$i ././reg-test/input/abixy
 ABI:PANPAN1ABI:EKSPAN2ABI:WYEWYE3ABI:EKSWYE4ABI:WYEPAN5ABI:ZEEPAN6ABI:EKSZEE7ABI:ZEEWYE8ABI:HATWYE9ABI:PANWYE10
 mlr put -q printn > stdout, "abi:".$a.$b.$i ././reg-test/input/abixy
 abi:panpan1abi:ekspan2abi:wyewye3abi:ekswye4abi:wyepan5abi:zeepan6abi:ekszee7abi:zeewye8abi:hatwye9abi:panwye10
-cat ./output-regtest/printn1/err1
+cat ./output-reg-test/printn1/err1
 
 mlr put -q printn > stderr, "abi:".$a.$b.$i ././reg-test/input/abixy
 
-cat ./output-regtest/printn1/err2
+cat ./output-reg-test/printn1/err2
 
 
 ================================================================
 DSL DUMP REDIRECTS
 
-mlr put -q @v=$*; dump > "./output-regtest/dump1/out.".$a ././reg-test/input/abixy
+mlr put -q @v=$*; dump > "./output-reg-test/dump1/out.".$a ././reg-test/input/abixy
 
-cat ./output-regtest/dump1/out.eks
+cat ./output-reg-test/dump1/out.eks
 {
   "v": {
     "a": "eks",
@@ -408,7 +408,7 @@ cat ./output-regtest/dump1/out.eks
   }
 }
 
-cat ./output-regtest/dump1/out.hat
+cat ./output-reg-test/dump1/out.hat
 {
   "v": {
     "a": "hat",
@@ -419,7 +419,7 @@ cat ./output-regtest/dump1/out.hat
   }
 }
 
-cat ./output-regtest/dump1/out.pan
+cat ./output-reg-test/dump1/out.pan
 {
   "v": {
     "a": "pan",
@@ -439,7 +439,7 @@ cat ./output-regtest/dump1/out.pan
   }
 }
 
-cat ./output-regtest/dump1/out.wye
+cat ./output-reg-test/dump1/out.wye
 {
   "v": {
     "a": "wye",
@@ -459,7 +459,7 @@ cat ./output-regtest/dump1/out.wye
   }
 }
 
-cat ./output-regtest/dump1/out.zee
+cat ./output-reg-test/dump1/out.zee
 {
   "v": {
     "a": "zee",
@@ -479,9 +479,9 @@ cat ./output-regtest/dump1/out.zee
   }
 }
 
-mlr put -q @v=$*; dump > "./output-regtest/dump1/out.".$a ././reg-test/input/abixy
+mlr put -q @v=$*; dump > "./output-reg-test/dump1/out.".$a ././reg-test/input/abixy
 
-cat ./output-regtest/dump1/out.eks
+cat ./output-reg-test/dump1/out.eks
 {
   "v": {
     "a": "eks",
@@ -510,7 +510,7 @@ cat ./output-regtest/dump1/out.eks
   }
 }
 
-cat ./output-regtest/dump1/out.hat
+cat ./output-reg-test/dump1/out.hat
 {
   "v": {
     "a": "hat",
@@ -521,7 +521,7 @@ cat ./output-regtest/dump1/out.hat
   }
 }
 
-cat ./output-regtest/dump1/out.pan
+cat ./output-reg-test/dump1/out.pan
 {
   "v": {
     "a": "pan",
@@ -541,7 +541,7 @@ cat ./output-regtest/dump1/out.pan
   }
 }
 
-cat ./output-regtest/dump1/out.wye
+cat ./output-reg-test/dump1/out.wye
 {
   "v": {
     "a": "wye",
@@ -561,7 +561,7 @@ cat ./output-regtest/dump1/out.wye
   }
 }
 
-cat ./output-regtest/dump1/out.zee
+cat ./output-reg-test/dump1/out.zee
 {
   "v": {
     "a": "zee",
@@ -581,9 +581,9 @@ cat ./output-regtest/dump1/out.zee
   }
 }
 
-mlr put -q @v=$*; dump >> "./output-regtest/dump1/out.".$a ././reg-test/input/abixy
+mlr put -q @v=$*; dump >> "./output-reg-test/dump1/out.".$a ././reg-test/input/abixy
 
-cat ./output-regtest/dump1/out.eks
+cat ./output-reg-test/dump1/out.eks
 {
   "v": {
     "a": "eks",
@@ -639,7 +639,7 @@ cat ./output-regtest/dump1/out.eks
   }
 }
 
-cat ./output-regtest/dump1/out.hat
+cat ./output-reg-test/dump1/out.hat
 {
   "v": {
     "a": "hat",
@@ -659,7 +659,7 @@ cat ./output-regtest/dump1/out.hat
   }
 }
 
-cat ./output-regtest/dump1/out.pan
+cat ./output-reg-test/dump1/out.pan
 {
   "v": {
     "a": "pan",
@@ -697,7 +697,7 @@ cat ./output-regtest/dump1/out.pan
   }
 }
 
-cat ./output-regtest/dump1/out.wye
+cat ./output-reg-test/dump1/out.wye
 {
   "v": {
     "a": "wye",
@@ -735,7 +735,7 @@ cat ./output-regtest/dump1/out.wye
   }
 }
 
-cat ./output-regtest/dump1/out.zee
+cat ./output-reg-test/dump1/out.zee
 {
   "v": {
     "a": "zee",
@@ -885,152 +885,152 @@ mlr put -q @v[NR] = $*; NR == 2 { dump > stdout } ././reg-test/input/abixy
   }
 }
 
-cat ./output-regtest/dump1/err1
+cat ./output-reg-test/dump1/err1
 
 mlr put -q @v[NR] = $*; NR == 2 { dump > stderr } ././reg-test/input/abixy
 
-cat ./output-regtest/dump1/err2
+cat ./output-reg-test/dump1/err2
 
 
 ================================================================
 DSL EMITF REDIRECTS
 
-mlr put -q @a=$a; @b=$b; emitf > "./output-regtest/emitf1/out.".$a.$b, @a, @b ././reg-test/input/abixy
+mlr put -q @a=$a; @b=$b; emitf > "./output-reg-test/emitf1/out.".$a.$b, @a, @b ././reg-test/input/abixy
 
-cat ./output-regtest/emitf1/out.ekspan
+cat ./output-reg-test/emitf1/out.ekspan
 a=eks,b=pan
 
-cat ./output-regtest/emitf1/out.ekswye
+cat ./output-reg-test/emitf1/out.ekswye
 a=eks,b=wye
 
-cat ./output-regtest/emitf1/out.ekszee
+cat ./output-reg-test/emitf1/out.ekszee
 a=eks,b=zee
 
-cat ./output-regtest/emitf1/out.hatwye
+cat ./output-reg-test/emitf1/out.hatwye
 a=hat,b=wye
 
-cat ./output-regtest/emitf1/out.panpan
+cat ./output-reg-test/emitf1/out.panpan
 a=pan,b=pan
 
-cat ./output-regtest/emitf1/out.panwye
+cat ./output-reg-test/emitf1/out.panwye
 a=pan,b=wye
 
-cat ./output-regtest/emitf1/out.wyepan
+cat ./output-reg-test/emitf1/out.wyepan
 a=wye,b=pan
 
-cat ./output-regtest/emitf1/out.wyewye
+cat ./output-reg-test/emitf1/out.wyewye
 a=wye,b=wye
 
-cat ./output-regtest/emitf1/out.zeepan
+cat ./output-reg-test/emitf1/out.zeepan
 a=zee,b=pan
 
-cat ./output-regtest/emitf1/out.zeewye
+cat ./output-reg-test/emitf1/out.zeewye
 a=zee,b=wye
 
-mlr put -q @a=$a; @b=$b; emitf > "./output-regtest/emitf1/out.".$a.$b, @a, @b ././reg-test/input/abixy
+mlr put -q @a=$a; @b=$b; emitf > "./output-reg-test/emitf1/out.".$a.$b, @a, @b ././reg-test/input/abixy
 
-cat ./output-regtest/emitf1/out.ekspan
+cat ./output-reg-test/emitf1/out.ekspan
 a=eks,b=pan
 
-cat ./output-regtest/emitf1/out.ekswye
+cat ./output-reg-test/emitf1/out.ekswye
 a=eks,b=wye
 
-cat ./output-regtest/emitf1/out.ekszee
+cat ./output-reg-test/emitf1/out.ekszee
 a=eks,b=zee
 
-cat ./output-regtest/emitf1/out.hatwye
+cat ./output-reg-test/emitf1/out.hatwye
 a=hat,b=wye
 
-cat ./output-regtest/emitf1/out.panpan
+cat ./output-reg-test/emitf1/out.panpan
 a=pan,b=pan
 
-cat ./output-regtest/emitf1/out.panwye
+cat ./output-reg-test/emitf1/out.panwye
 a=pan,b=wye
 
-cat ./output-regtest/emitf1/out.wyepan
+cat ./output-reg-test/emitf1/out.wyepan
 a=wye,b=pan
 
-cat ./output-regtest/emitf1/out.wyewye
+cat ./output-reg-test/emitf1/out.wyewye
 a=wye,b=wye
 
-cat ./output-regtest/emitf1/out.zeepan
+cat ./output-reg-test/emitf1/out.zeepan
 a=zee,b=pan
 
-cat ./output-regtest/emitf1/out.zeewye
+cat ./output-reg-test/emitf1/out.zeewye
 a=zee,b=wye
 
-mlr put -q @a=$a; @b=$b; emitf >> "./output-regtest/emitf1/out.".$a.$b, @a, @b ././reg-test/input/abixy
+mlr put -q @a=$a; @b=$b; emitf >> "./output-reg-test/emitf1/out.".$a.$b, @a, @b ././reg-test/input/abixy
 
-cat ./output-regtest/emitf1/out.ekspan
+cat ./output-reg-test/emitf1/out.ekspan
 a=eks,b=pan
 a=eks,b=pan
 
-cat ./output-regtest/emitf1/out.ekswye
+cat ./output-reg-test/emitf1/out.ekswye
 a=eks,b=wye
 a=eks,b=wye
 
-cat ./output-regtest/emitf1/out.ekszee
+cat ./output-reg-test/emitf1/out.ekszee
 a=eks,b=zee
 a=eks,b=zee
 
-cat ./output-regtest/emitf1/out.hatwye
+cat ./output-reg-test/emitf1/out.hatwye
 a=hat,b=wye
 a=hat,b=wye
 
-cat ./output-regtest/emitf1/out.panpan
+cat ./output-reg-test/emitf1/out.panpan
 a=pan,b=pan
 a=pan,b=pan
 
-cat ./output-regtest/emitf1/out.panwye
+cat ./output-reg-test/emitf1/out.panwye
 a=pan,b=wye
 a=pan,b=wye
 
-cat ./output-regtest/emitf1/out.wyepan
+cat ./output-reg-test/emitf1/out.wyepan
 a=wye,b=pan
 a=wye,b=pan
 
-cat ./output-regtest/emitf1/out.wyewye
+cat ./output-reg-test/emitf1/out.wyewye
 a=wye,b=wye
 a=wye,b=wye
 
-cat ./output-regtest/emitf1/out.zeepan
+cat ./output-reg-test/emitf1/out.zeepan
 a=zee,b=pan
 a=zee,b=pan
 
-cat ./output-regtest/emitf1/out.zeewye
+cat ./output-reg-test/emitf1/out.zeewye
 a=zee,b=wye
 a=zee,b=wye
 
-mlr put -q -o json @a=$a; @b=$b; emitf > "./output-regtest/emitf1/out.".$a.$b, @a, @b ././reg-test/input/abixy
+mlr put -q -o json @a=$a; @b=$b; emitf > "./output-reg-test/emitf1/out.".$a.$b, @a, @b ././reg-test/input/abixy
 
-cat ./output-regtest/emitf1/out.ekspan
+cat ./output-reg-test/emitf1/out.ekspan
 { "a": "eks", "b": "pan" }
 
-cat ./output-regtest/emitf1/out.ekswye
+cat ./output-reg-test/emitf1/out.ekswye
 { "a": "eks", "b": "wye" }
 
-cat ./output-regtest/emitf1/out.ekszee
+cat ./output-reg-test/emitf1/out.ekszee
 { "a": "eks", "b": "zee" }
 
-cat ./output-regtest/emitf1/out.hatwye
+cat ./output-reg-test/emitf1/out.hatwye
 { "a": "hat", "b": "wye" }
 
-cat ./output-regtest/emitf1/out.panpan
+cat ./output-reg-test/emitf1/out.panpan
 { "a": "pan", "b": "pan" }
 
-cat ./output-regtest/emitf1/out.panwye
+cat ./output-reg-test/emitf1/out.panwye
 { "a": "pan", "b": "wye" }
 
-cat ./output-regtest/emitf1/out.wyepan
+cat ./output-reg-test/emitf1/out.wyepan
 { "a": "wye", "b": "pan" }
 
-cat ./output-regtest/emitf1/out.wyewye
+cat ./output-reg-test/emitf1/out.wyewye
 { "a": "wye", "b": "wye" }
 
-cat ./output-regtest/emitf1/out.zeepan
+cat ./output-reg-test/emitf1/out.zeepan
 { "a": "zee", "b": "pan" }
 
-cat ./output-regtest/emitf1/out.zeewye
+cat ./output-reg-test/emitf1/out.zeewye
 { "a": "zee", "b": "wye" }
 
 mlr put -q @a=$a; @b=$b; emitf | "tr \[a-z\] \[A-Z\]", @a, @b ././reg-test/input/abixy
@@ -1057,74 +1057,74 @@ a=zee,b=wye
 a=hat,b=wye
 a=pan,b=wye
 
-cat ./output-regtest/emitf1/err1
+cat ./output-reg-test/emitf1/err1
 
 mlr put -q @a=$a; @b=$b; emitf > stderr, @a, @b ././reg-test/input/abixy
 
-cat ./output-regtest/emitf1/err2
+cat ./output-reg-test/emitf1/err2
 
 
 ================================================================
 DSL EMITP REDIRECTS
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp1/out.".$a.$b, @a ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp1/out.".$a.$b, @a ././reg-test/input/abixy
 
-cat ./output-regtest/emitp1/out.ekspan
+cat ./output-reg-test/emitp1/out.ekspan
 a:1=pan,a:2=eks
 
-cat ./output-regtest/emitp1/out.ekswye
+cat ./output-reg-test/emitp1/out.ekswye
 a:1=pan,a:2=eks,a:3=wye,a:4=eks
 
-cat ./output-regtest/emitp1/out.panpan
+cat ./output-reg-test/emitp1/out.panpan
 a:1=pan
 
-cat ./output-regtest/emitp1/out.wyewye
+cat ./output-reg-test/emitp1/out.wyewye
 a:1=pan,a:2=eks,a:3=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp1/out.".$a.$b, @a ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp1/out.".$a.$b, @a ././reg-test/input/abixy
 
-cat ./output-regtest/emitp1/out.ekspan
+cat ./output-reg-test/emitp1/out.ekspan
 a:1=pan,a:2=eks
 
-cat ./output-regtest/emitp1/out.ekswye
+cat ./output-reg-test/emitp1/out.ekswye
 a:1=pan,a:2=eks,a:3=wye,a:4=eks
 
-cat ./output-regtest/emitp1/out.panpan
+cat ./output-reg-test/emitp1/out.panpan
 a:1=pan
 
-cat ./output-regtest/emitp1/out.wyewye
+cat ./output-reg-test/emitp1/out.wyewye
 a:1=pan,a:2=eks,a:3=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp >> "./output-regtest/emitp1/out.".$a.$b, @a ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp >> "./output-reg-test/emitp1/out.".$a.$b, @a ././reg-test/input/abixy
 
-cat ./output-regtest/emitp1/out.ekspan
+cat ./output-reg-test/emitp1/out.ekspan
 a:1=pan,a:2=eks
 a:1=pan,a:2=eks
 
-cat ./output-regtest/emitp1/out.ekswye
+cat ./output-reg-test/emitp1/out.ekswye
 a:1=pan,a:2=eks,a:3=wye,a:4=eks
 a:1=pan,a:2=eks,a:3=wye,a:4=eks
 
-cat ./output-regtest/emitp1/out.panpan
+cat ./output-reg-test/emitp1/out.panpan
 a:1=pan
 a:1=pan
 
-cat ./output-regtest/emitp1/out.wyewye
+cat ./output-reg-test/emitp1/out.wyewye
 a:1=pan,a:2=eks,a:3=wye
 a:1=pan,a:2=eks,a:3=wye
 
-mlr head -n 4 then put -q -o json @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp1/out.".$a.$b, @a ././reg-test/input/abixy
+mlr head -n 4 then put -q -o json @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp1/out.".$a.$b, @a ././reg-test/input/abixy
 
-cat ./output-regtest/emitp1/out.ekspan
+cat ./output-reg-test/emitp1/out.ekspan
 { "a": {"1": "pan", "2": "eks" } }
 
-cat ./output-regtest/emitp1/out.ekswye
+cat ./output-reg-test/emitp1/out.ekswye
 { "a": {"1": "pan", "2": "eks", "3": "wye", "4": "eks" } }
 
-cat ./output-regtest/emitp1/out.panpan
+cat ./output-reg-test/emitp1/out.panpan
 { "a": {"1": "pan" } }
 
-cat ./output-regtest/emitp1/out.wyewye
+cat ./output-reg-test/emitp1/out.wyewye
 { "a": {"1": "pan", "2": "eks", "3": "wye" } }
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp | "tr \[a-z\] \[A-Z\]", @a ././reg-test/input/abixy
@@ -1139,61 +1139,61 @@ a:1=pan,a:2=eks
 a:1=pan,a:2=eks,a:3=wye
 a:1=pan,a:2=eks,a:3=wye,a:4=eks
 
-cat ./output-regtest/emitp1/err1
+cat ./output-reg-test/emitp1/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > stderr, @a ././reg-test/input/abixy
 
-cat ./output-regtest/emitp1/err2
+cat ./output-reg-test/emitp1/err2
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emitp2/out.ekspan
+cat ./output-reg-test/emitp2/out.ekspan
 NR=1,a=pan
 NR=2,a=eks
 
-cat ./output-regtest/emitp2/out.ekswye
+cat ./output-reg-test/emitp2/out.ekswye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
 NR=4,a=eks
 
-cat ./output-regtest/emitp2/out.panpan
+cat ./output-reg-test/emitp2/out.panpan
 NR=1,a=pan
 
-cat ./output-regtest/emitp2/out.wyewye
+cat ./output-reg-test/emitp2/out.wyewye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emitp2/out.ekspan
+cat ./output-reg-test/emitp2/out.ekspan
 NR=1,a=pan
 NR=2,a=eks
 
-cat ./output-regtest/emitp2/out.ekswye
+cat ./output-reg-test/emitp2/out.ekswye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
 NR=4,a=eks
 
-cat ./output-regtest/emitp2/out.panpan
+cat ./output-reg-test/emitp2/out.panpan
 NR=1,a=pan
 
-cat ./output-regtest/emitp2/out.wyewye
+cat ./output-reg-test/emitp2/out.wyewye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp >> "./output-regtest/emitp2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp >> "./output-reg-test/emitp2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emitp2/out.ekspan
+cat ./output-reg-test/emitp2/out.ekspan
 NR=1,a=pan
 NR=2,a=eks
 NR=1,a=pan
 NR=2,a=eks
 
-cat ./output-regtest/emitp2/out.ekswye
+cat ./output-reg-test/emitp2/out.ekswye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
@@ -1203,11 +1203,11 @@ NR=2,a=eks
 NR=3,a=wye
 NR=4,a=eks
 
-cat ./output-regtest/emitp2/out.panpan
+cat ./output-reg-test/emitp2/out.panpan
 NR=1,a=pan
 NR=1,a=pan
 
-cat ./output-regtest/emitp2/out.wyewye
+cat ./output-reg-test/emitp2/out.wyewye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
@@ -1215,22 +1215,22 @@ NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
 
-mlr head -n 4 then put -q -o json @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q -o json @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emitp2/out.ekspan
+cat ./output-reg-test/emitp2/out.ekspan
 { "NR": 1, "a": "pan" }
 { "NR": 2, "a": "eks" }
 
-cat ./output-regtest/emitp2/out.ekswye
+cat ./output-reg-test/emitp2/out.ekswye
 { "NR": 1, "a": "pan" }
 { "NR": 2, "a": "eks" }
 { "NR": 3, "a": "wye" }
 { "NR": 4, "a": "eks" }
 
-cat ./output-regtest/emitp2/out.panpan
+cat ./output-reg-test/emitp2/out.panpan
 { "NR": 1, "a": "pan" }
 
-cat ./output-regtest/emitp2/out.wyewye
+cat ./output-reg-test/emitp2/out.wyewye
 { "NR": 1, "a": "pan" }
 { "NR": 2, "a": "eks" }
 { "NR": 3, "a": "wye" }
@@ -1259,70 +1259,70 @@ NR=2,a=eks
 NR=3,a=wye
 NR=4,a=eks
 
-cat ./output-regtest/emitp2/err1
+cat ./output-reg-test/emitp2/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > stderr, @a, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emitp2/err2
+cat ./output-reg-test/emitp2/err2
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
 
-cat ./output-regtest/emitp3/out.ekspan
+cat ./output-reg-test/emitp3/out.ekspan
 a:1=pan,b:1=pan,a:2=eks,b:2=pan
 
-cat ./output-regtest/emitp3/out.ekswye
+cat ./output-reg-test/emitp3/out.ekswye
 a:1=pan,b:1=pan,a:2=eks,b:2=pan,a:3=wye,b:3=wye,a:4=eks,b:4=wye
 
-cat ./output-regtest/emitp3/out.panpan
+cat ./output-reg-test/emitp3/out.panpan
 a:1=pan,b:1=pan
 
-cat ./output-regtest/emitp3/out.wyewye
+cat ./output-reg-test/emitp3/out.wyewye
 a:1=pan,b:1=pan,a:2=eks,b:2=pan,a:3=wye,b:3=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
 
-cat ./output-regtest/emitp3/out.ekspan
+cat ./output-reg-test/emitp3/out.ekspan
 a:1=pan,b:1=pan,a:2=eks,b:2=pan
 
-cat ./output-regtest/emitp3/out.ekswye
+cat ./output-reg-test/emitp3/out.ekswye
 a:1=pan,b:1=pan,a:2=eks,b:2=pan,a:3=wye,b:3=wye,a:4=eks,b:4=wye
 
-cat ./output-regtest/emitp3/out.panpan
+cat ./output-reg-test/emitp3/out.panpan
 a:1=pan,b:1=pan
 
-cat ./output-regtest/emitp3/out.wyewye
+cat ./output-reg-test/emitp3/out.wyewye
 a:1=pan,b:1=pan,a:2=eks,b:2=pan,a:3=wye,b:3=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp >> "./output-regtest/emitp3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp >> "./output-reg-test/emitp3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
 
-cat ./output-regtest/emitp3/out.ekspan
+cat ./output-reg-test/emitp3/out.ekspan
 a:1=pan,b:1=pan,a:2=eks,b:2=pan
 a:1=pan,b:1=pan,a:2=eks,b:2=pan
 
-cat ./output-regtest/emitp3/out.ekswye
+cat ./output-reg-test/emitp3/out.ekswye
 a:1=pan,b:1=pan,a:2=eks,b:2=pan,a:3=wye,b:3=wye,a:4=eks,b:4=wye
 a:1=pan,b:1=pan,a:2=eks,b:2=pan,a:3=wye,b:3=wye,a:4=eks,b:4=wye
 
-cat ./output-regtest/emitp3/out.panpan
+cat ./output-reg-test/emitp3/out.panpan
 a:1=pan,b:1=pan
 a:1=pan,b:1=pan
 
-cat ./output-regtest/emitp3/out.wyewye
+cat ./output-reg-test/emitp3/out.wyewye
 a:1=pan,b:1=pan,a:2=eks,b:2=pan,a:3=wye,b:3=wye
 a:1=pan,b:1=pan,a:2=eks,b:2=pan,a:3=wye,b:3=wye
 
-mlr head -n 4 then put -q -o json @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
+mlr head -n 4 then put -q -o json @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
 
-cat ./output-regtest/emitp3/out.ekspan
+cat ./output-reg-test/emitp3/out.ekspan
 { "a": {"1": "pan", "2": "eks" },"b": {"1": "pan", "2": "pan" } }
 
-cat ./output-regtest/emitp3/out.ekswye
+cat ./output-reg-test/emitp3/out.ekswye
 { "a": {"1": "pan", "2": "eks", "3": "wye", "4": "eks" },"b": {"1": "pan", "2": "pan", "3": "wye", "4": "wye" } }
 
-cat ./output-regtest/emitp3/out.panpan
+cat ./output-reg-test/emitp3/out.panpan
 { "a": {"1": "pan" },"b": {"1": "pan" } }
 
-cat ./output-regtest/emitp3/out.wyewye
+cat ./output-reg-test/emitp3/out.wyewye
 { "a": {"1": "pan", "2": "eks", "3": "wye" },"b": {"1": "pan", "2": "pan", "3": "wye" } }
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp | "tr \[a-z\] \[A-Z\]", (@a, @b) ././reg-test/input/abixy
@@ -1337,61 +1337,61 @@ a:1=pan,b:1=pan,a:2=eks,b:2=pan
 a:1=pan,b:1=pan,a:2=eks,b:2=pan,a:3=wye,b:3=wye
 a:1=pan,b:1=pan,a:2=eks,b:2=pan,a:3=wye,b:3=wye,a:4=eks,b:4=wye
 
-cat ./output-regtest/emitp3/err1
+cat ./output-reg-test/emitp3/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > stderr, (@a, @b) ././reg-test/input/abixy
 
-cat ./output-regtest/emitp3/err2
+cat ./output-reg-test/emitp3/err2
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emitp4/out.ekspan
+cat ./output-reg-test/emitp4/out.ekspan
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 
-cat ./output-regtest/emitp4/out.ekswye
+cat ./output-reg-test/emitp4/out.ekswye
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
 NR=4,a=eks,b=wye
 
-cat ./output-regtest/emitp4/out.panpan
+cat ./output-reg-test/emitp4/out.panpan
 NR=1,a=pan,b=pan
 
-cat ./output-regtest/emitp4/out.wyewye
+cat ./output-reg-test/emitp4/out.wyewye
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emitp4/out.ekspan
+cat ./output-reg-test/emitp4/out.ekspan
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 
-cat ./output-regtest/emitp4/out.ekswye
+cat ./output-reg-test/emitp4/out.ekswye
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
 NR=4,a=eks,b=wye
 
-cat ./output-regtest/emitp4/out.panpan
+cat ./output-reg-test/emitp4/out.panpan
 NR=1,a=pan,b=pan
 
-cat ./output-regtest/emitp4/out.wyewye
+cat ./output-reg-test/emitp4/out.wyewye
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp >> "./output-regtest/emitp4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp >> "./output-reg-test/emitp4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emitp4/out.ekspan
+cat ./output-reg-test/emitp4/out.ekspan
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 
-cat ./output-regtest/emitp4/out.ekswye
+cat ./output-reg-test/emitp4/out.ekswye
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
@@ -1401,11 +1401,11 @@ NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
 NR=4,a=eks,b=wye
 
-cat ./output-regtest/emitp4/out.panpan
+cat ./output-reg-test/emitp4/out.panpan
 NR=1,a=pan,b=pan
 NR=1,a=pan,b=pan
 
-cat ./output-regtest/emitp4/out.wyewye
+cat ./output-reg-test/emitp4/out.wyewye
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
@@ -1413,22 +1413,22 @@ NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
 
-mlr head -n 4 then put -q -o json @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q -o json @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emitp4/out.ekspan
+cat ./output-reg-test/emitp4/out.ekspan
 { "NR": 1, "a": "pan", "b": "pan" }
 { "NR": 2, "a": "eks", "b": "pan" }
 
-cat ./output-regtest/emitp4/out.ekswye
+cat ./output-reg-test/emitp4/out.ekswye
 { "NR": 1, "a": "pan", "b": "pan" }
 { "NR": 2, "a": "eks", "b": "pan" }
 { "NR": 3, "a": "wye", "b": "wye" }
 { "NR": 4, "a": "eks", "b": "wye" }
 
-cat ./output-regtest/emitp4/out.panpan
+cat ./output-reg-test/emitp4/out.panpan
 { "NR": 1, "a": "pan", "b": "pan" }
 
-cat ./output-regtest/emitp4/out.wyewye
+cat ./output-reg-test/emitp4/out.wyewye
 { "NR": 1, "a": "pan", "b": "pan" }
 { "NR": 2, "a": "eks", "b": "pan" }
 { "NR": 3, "a": "wye", "b": "wye" }
@@ -1457,27 +1457,27 @@ NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
 NR=4,a=eks,b=wye
 
-cat ./output-regtest/emitp4/err1
+cat ./output-reg-test/emitp4/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > stderr, (@a, @b), "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emitp4/err2
+cat ./output-reg-test/emitp4/err2
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp5/out.".$a.$b, @* ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp5/out.".$a.$b, @* ././reg-test/input/abixy
 
-cat ./output-regtest/emitp5/out.ekspan
+cat ./output-reg-test/emitp5/out.ekspan
 a:1=pan,a:2=eks
 b:1=pan,b:2=pan
 
-cat ./output-regtest/emitp5/out.ekswye
+cat ./output-reg-test/emitp5/out.ekswye
 a:1=pan,a:2=eks,a:3=wye,a:4=eks
 b:1=pan,b:2=pan,b:3=wye,b:4=wye
 
-cat ./output-regtest/emitp5/out.panpan
+cat ./output-reg-test/emitp5/out.panpan
 a:1=pan
 b:1=pan
 
-cat ./output-regtest/emitp5/out.wyewye
+cat ./output-reg-test/emitp5/out.wyewye
 a:1=pan,a:2=eks,a:3=wye
 b:1=pan,b:2=pan,b:3=wye
 
@@ -1501,27 +1501,27 @@ b:1=pan,b:2=pan,b:3=wye
 a:1=pan,a:2=eks,a:3=wye,a:4=eks
 b:1=pan,b:2=pan,b:3=wye,b:4=wye
 
-cat ./output-regtest/emitp5/err1
+cat ./output-reg-test/emitp5/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > stderr, @* ././reg-test/input/abixy
 
-cat ./output-regtest/emitp5/err2
+cat ./output-reg-test/emitp5/err2
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp6/out.".$a.$b, all ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp6/out.".$a.$b, all ././reg-test/input/abixy
 
-cat ./output-regtest/emitp6/out.ekspan
+cat ./output-reg-test/emitp6/out.ekspan
 a:1=pan,a:2=eks
 b:1=pan,b:2=pan
 
-cat ./output-regtest/emitp6/out.ekswye
+cat ./output-reg-test/emitp6/out.ekswye
 a:1=pan,a:2=eks,a:3=wye,a:4=eks
 b:1=pan,b:2=pan,b:3=wye,b:4=wye
 
-cat ./output-regtest/emitp6/out.panpan
+cat ./output-reg-test/emitp6/out.panpan
 a:1=pan
 b:1=pan
 
-cat ./output-regtest/emitp6/out.wyewye
+cat ./output-reg-test/emitp6/out.wyewye
 a:1=pan,a:2=eks,a:3=wye
 b:1=pan,b:2=pan,b:3=wye
 
@@ -1545,21 +1545,21 @@ b:1=pan,b:2=pan,b:3=wye
 a:1=pan,a:2=eks,a:3=wye,a:4=eks
 b:1=pan,b:2=pan,b:3=wye,b:4=wye
 
-cat ./output-regtest/emitp6/err1
+cat ./output-reg-test/emitp6/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > stderr, all ././reg-test/input/abixy
 
-cat ./output-regtest/emitp6/err2
+cat ./output-reg-test/emitp6/err2
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp7/out.".$a.$b, @*, "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp7/out.".$a.$b, @*, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emitp7/out.ekspan
+cat ./output-reg-test/emitp7/out.ekspan
 NR=1,a=pan
 NR=2,a=eks
 NR=1,b=pan
 NR=2,b=pan
 
-cat ./output-regtest/emitp7/out.ekswye
+cat ./output-reg-test/emitp7/out.ekswye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
@@ -1569,11 +1569,11 @@ NR=2,b=pan
 NR=3,b=wye
 NR=4,b=wye
 
-cat ./output-regtest/emitp7/out.panpan
+cat ./output-reg-test/emitp7/out.panpan
 NR=1,a=pan
 NR=1,b=pan
 
-cat ./output-regtest/emitp7/out.wyewye
+cat ./output-reg-test/emitp7/out.wyewye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
@@ -1625,21 +1625,21 @@ NR=2,b=pan
 NR=3,b=wye
 NR=4,b=wye
 
-cat ./output-regtest/emitp7/err1
+cat ./output-reg-test/emitp7/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > stderr, @*, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emitp7/err2
+cat ./output-reg-test/emitp7/err2
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-regtest/emitp8/out.".$a.$b, all, "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > "./output-reg-test/emitp8/out.".$a.$b, all, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emitp8/out.ekspan
+cat ./output-reg-test/emitp8/out.ekspan
 NR=1,a=pan
 NR=2,a=eks
 NR=1,b=pan
 NR=2,b=pan
 
-cat ./output-regtest/emitp8/out.ekswye
+cat ./output-reg-test/emitp8/out.ekswye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
@@ -1649,11 +1649,11 @@ NR=2,b=pan
 NR=3,b=wye
 NR=4,b=wye
 
-cat ./output-regtest/emitp8/out.panpan
+cat ./output-reg-test/emitp8/out.panpan
 NR=1,a=pan
 NR=1,b=pan
 
-cat ./output-regtest/emitp8/out.wyewye
+cat ./output-reg-test/emitp8/out.wyewye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
@@ -1705,74 +1705,74 @@ NR=2,b=pan
 NR=3,b=wye
 NR=4,b=wye
 
-cat ./output-regtest/emitp8/err1
+cat ./output-reg-test/emitp8/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emitp > stderr, all, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emitp8/err2
+cat ./output-reg-test/emitp8/err2
 
 
 ================================================================
 DSL EMIT REDIRECTS
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit1/out.".$a.$b, @a ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit1/out.".$a.$b, @a ././reg-test/input/abixy
 
-cat ./output-regtest/emit1/out.ekspan
+cat ./output-reg-test/emit1/out.ekspan
 1=pan,2=eks
 
-cat ./output-regtest/emit1/out.ekswye
+cat ./output-reg-test/emit1/out.ekswye
 1=pan,2=eks,3=wye,4=eks
 
-cat ./output-regtest/emit1/out.panpan
+cat ./output-reg-test/emit1/out.panpan
 1=pan
 
-cat ./output-regtest/emit1/out.wyewye
+cat ./output-reg-test/emit1/out.wyewye
 1=pan,2=eks,3=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit1/out.".$a.$b, @a ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit1/out.".$a.$b, @a ././reg-test/input/abixy
 
-cat ./output-regtest/emit1/out.ekspan
+cat ./output-reg-test/emit1/out.ekspan
 1=pan,2=eks
 
-cat ./output-regtest/emit1/out.ekswye
+cat ./output-reg-test/emit1/out.ekswye
 1=pan,2=eks,3=wye,4=eks
 
-cat ./output-regtest/emit1/out.panpan
+cat ./output-reg-test/emit1/out.panpan
 1=pan
 
-cat ./output-regtest/emit1/out.wyewye
+cat ./output-reg-test/emit1/out.wyewye
 1=pan,2=eks,3=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit >> "./output-regtest/emit1/out.".$a.$b, @a ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit >> "./output-reg-test/emit1/out.".$a.$b, @a ././reg-test/input/abixy
 
-cat ./output-regtest/emit1/out.ekspan
+cat ./output-reg-test/emit1/out.ekspan
 1=pan,2=eks
 1=pan,2=eks
 
-cat ./output-regtest/emit1/out.ekswye
+cat ./output-reg-test/emit1/out.ekswye
 1=pan,2=eks,3=wye,4=eks
 1=pan,2=eks,3=wye,4=eks
 
-cat ./output-regtest/emit1/out.panpan
+cat ./output-reg-test/emit1/out.panpan
 1=pan
 1=pan
 
-cat ./output-regtest/emit1/out.wyewye
+cat ./output-reg-test/emit1/out.wyewye
 1=pan,2=eks,3=wye
 1=pan,2=eks,3=wye
 
-mlr head -n 4 then put -q -o json @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit1/out.".$a.$b, @a ././reg-test/input/abixy
+mlr head -n 4 then put -q -o json @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit1/out.".$a.$b, @a ././reg-test/input/abixy
 
-cat ./output-regtest/emit1/out.ekspan
+cat ./output-reg-test/emit1/out.ekspan
 { "1": "pan", "2": "eks" }
 
-cat ./output-regtest/emit1/out.ekswye
+cat ./output-reg-test/emit1/out.ekswye
 { "1": "pan", "2": "eks", "3": "wye", "4": "eks" }
 
-cat ./output-regtest/emit1/out.panpan
+cat ./output-reg-test/emit1/out.panpan
 { "1": "pan" }
 
-cat ./output-regtest/emit1/out.wyewye
+cat ./output-reg-test/emit1/out.wyewye
 { "1": "pan", "2": "eks", "3": "wye" }
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit | "tr \[a-z\] \[A-Z\]", @a ././reg-test/input/abixy
@@ -1787,61 +1787,61 @@ mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > stdout, @a ././reg-test/i
 1=pan,2=eks,3=wye
 1=pan,2=eks,3=wye,4=eks
 
-cat ./output-regtest/emit1/err1
+cat ./output-reg-test/emit1/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > stderr, @a ././reg-test/input/abixy
 
-cat ./output-regtest/emit1/err2
+cat ./output-reg-test/emit1/err2
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit2/out.ekspan
+cat ./output-reg-test/emit2/out.ekspan
 NR=1,a=pan
 NR=2,a=eks
 
-cat ./output-regtest/emit2/out.ekswye
+cat ./output-reg-test/emit2/out.ekswye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
 NR=4,a=eks
 
-cat ./output-regtest/emit2/out.panpan
+cat ./output-reg-test/emit2/out.panpan
 NR=1,a=pan
 
-cat ./output-regtest/emit2/out.wyewye
+cat ./output-reg-test/emit2/out.wyewye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit2/out.ekspan
+cat ./output-reg-test/emit2/out.ekspan
 NR=1,a=pan
 NR=2,a=eks
 
-cat ./output-regtest/emit2/out.ekswye
+cat ./output-reg-test/emit2/out.ekswye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
 NR=4,a=eks
 
-cat ./output-regtest/emit2/out.panpan
+cat ./output-reg-test/emit2/out.panpan
 NR=1,a=pan
 
-cat ./output-regtest/emit2/out.wyewye
+cat ./output-reg-test/emit2/out.wyewye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit >> "./output-regtest/emit2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit >> "./output-reg-test/emit2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit2/out.ekspan
+cat ./output-reg-test/emit2/out.ekspan
 NR=1,a=pan
 NR=2,a=eks
 NR=1,a=pan
 NR=2,a=eks
 
-cat ./output-regtest/emit2/out.ekswye
+cat ./output-reg-test/emit2/out.ekswye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
@@ -1851,11 +1851,11 @@ NR=2,a=eks
 NR=3,a=wye
 NR=4,a=eks
 
-cat ./output-regtest/emit2/out.panpan
+cat ./output-reg-test/emit2/out.panpan
 NR=1,a=pan
 NR=1,a=pan
 
-cat ./output-regtest/emit2/out.wyewye
+cat ./output-reg-test/emit2/out.wyewye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
@@ -1863,25 +1863,25 @@ NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
 
-mlr head -n 4 then put -q -o pprint @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q -o pprint @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit2/out.".$a.$b, @a, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit2/out.ekspan
+cat ./output-reg-test/emit2/out.ekspan
 NR a
 1  pan
 2  eks
 
-cat ./output-regtest/emit2/out.ekswye
+cat ./output-reg-test/emit2/out.ekswye
 NR a
 1  pan
 2  eks
 3  wye
 4  eks
 
-cat ./output-regtest/emit2/out.panpan
+cat ./output-reg-test/emit2/out.panpan
 NR a
 1  pan
 
-cat ./output-regtest/emit2/out.wyewye
+cat ./output-reg-test/emit2/out.wyewye
 NR a
 1  pan
 2  eks
@@ -1911,74 +1911,74 @@ NR=2,a=eks
 NR=3,a=wye
 NR=4,a=eks
 
-cat ./output-regtest/emit2/err1
+cat ./output-reg-test/emit2/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > stderr, @a, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit2/err2
+cat ./output-reg-test/emit2/err2
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
 
-cat ./output-regtest/emit3/out.ekspan
+cat ./output-reg-test/emit3/out.ekspan
 1=pan,2=pan
 
-cat ./output-regtest/emit3/out.ekswye
+cat ./output-reg-test/emit3/out.ekswye
 1=pan,2=pan,3=wye,4=wye
 
-cat ./output-regtest/emit3/out.panpan
+cat ./output-reg-test/emit3/out.panpan
 1=pan
 
-cat ./output-regtest/emit3/out.wyewye
+cat ./output-reg-test/emit3/out.wyewye
 1=pan,2=pan,3=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
 
-cat ./output-regtest/emit3/out.ekspan
+cat ./output-reg-test/emit3/out.ekspan
 1=pan,2=pan
 
-cat ./output-regtest/emit3/out.ekswye
+cat ./output-reg-test/emit3/out.ekswye
 1=pan,2=pan,3=wye,4=wye
 
-cat ./output-regtest/emit3/out.panpan
+cat ./output-reg-test/emit3/out.panpan
 1=pan
 
-cat ./output-regtest/emit3/out.wyewye
+cat ./output-reg-test/emit3/out.wyewye
 1=pan,2=pan,3=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit >> "./output-regtest/emit3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit >> "./output-reg-test/emit3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
 
-cat ./output-regtest/emit3/out.ekspan
+cat ./output-reg-test/emit3/out.ekspan
 1=pan,2=pan
 1=pan,2=pan
 
-cat ./output-regtest/emit3/out.ekswye
+cat ./output-reg-test/emit3/out.ekswye
 1=pan,2=pan,3=wye,4=wye
 1=pan,2=pan,3=wye,4=wye
 
-cat ./output-regtest/emit3/out.panpan
+cat ./output-reg-test/emit3/out.panpan
 1=pan
 1=pan
 
-cat ./output-regtest/emit3/out.wyewye
+cat ./output-reg-test/emit3/out.wyewye
 1=pan,2=pan,3=wye
 1=pan,2=pan,3=wye
 
-mlr head -n 4 then put -q --oxtab @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
+mlr head -n 4 then put -q --oxtab @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit3/out.".$a.$b, (@a, @b) ././reg-test/input/abixy
 
-cat ./output-regtest/emit3/out.ekspan
+cat ./output-reg-test/emit3/out.ekspan
 1 pan
 2 pan
 
-cat ./output-regtest/emit3/out.ekswye
+cat ./output-reg-test/emit3/out.ekswye
 1 pan
 2 pan
 3 wye
 4 wye
 
-cat ./output-regtest/emit3/out.panpan
+cat ./output-reg-test/emit3/out.panpan
 1 pan
 
-cat ./output-regtest/emit3/out.wyewye
+cat ./output-reg-test/emit3/out.wyewye
 1 pan
 2 pan
 3 wye
@@ -1995,61 +1995,61 @@ mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > stdout, (@a, @b) ././reg-
 1=pan,2=pan,3=wye
 1=pan,2=pan,3=wye,4=wye
 
-cat ./output-regtest/emit3/err1
+cat ./output-reg-test/emit3/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > stderr, (@a, @b) ././reg-test/input/abixy
 
-cat ./output-regtest/emit3/err2
+cat ./output-reg-test/emit3/err2
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit4/out.ekspan
+cat ./output-reg-test/emit4/out.ekspan
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 
-cat ./output-regtest/emit4/out.ekswye
+cat ./output-reg-test/emit4/out.ekswye
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
 NR=4,a=eks,b=wye
 
-cat ./output-regtest/emit4/out.panpan
+cat ./output-reg-test/emit4/out.panpan
 NR=1,a=pan,b=pan
 
-cat ./output-regtest/emit4/out.wyewye
+cat ./output-reg-test/emit4/out.wyewye
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit4/out.ekspan
+cat ./output-reg-test/emit4/out.ekspan
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 
-cat ./output-regtest/emit4/out.ekswye
+cat ./output-reg-test/emit4/out.ekswye
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
 NR=4,a=eks,b=wye
 
-cat ./output-regtest/emit4/out.panpan
+cat ./output-reg-test/emit4/out.panpan
 NR=1,a=pan,b=pan
 
-cat ./output-regtest/emit4/out.wyewye
+cat ./output-reg-test/emit4/out.wyewye
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit >> "./output-regtest/emit4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit >> "./output-reg-test/emit4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit4/out.ekspan
+cat ./output-reg-test/emit4/out.ekspan
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 
-cat ./output-regtest/emit4/out.ekswye
+cat ./output-reg-test/emit4/out.ekswye
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
@@ -2059,11 +2059,11 @@ NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
 NR=4,a=eks,b=wye
 
-cat ./output-regtest/emit4/out.panpan
+cat ./output-reg-test/emit4/out.panpan
 NR=1,a=pan,b=pan
 NR=1,a=pan,b=pan
 
-cat ./output-regtest/emit4/out.wyewye
+cat ./output-reg-test/emit4/out.wyewye
 NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
@@ -2071,22 +2071,22 @@ NR=1,a=pan,b=pan
 NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
 
-mlr head -n 4 then put -q --ojson @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q --ojson @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit4/out.".$a.$b, (@a, @b), "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit4/out.ekspan
+cat ./output-reg-test/emit4/out.ekspan
 { "NR": 1, "a": "pan", "b": "pan" }
 { "NR": 2, "a": "eks", "b": "pan" }
 
-cat ./output-regtest/emit4/out.ekswye
+cat ./output-reg-test/emit4/out.ekswye
 { "NR": 1, "a": "pan", "b": "pan" }
 { "NR": 2, "a": "eks", "b": "pan" }
 { "NR": 3, "a": "wye", "b": "wye" }
 { "NR": 4, "a": "eks", "b": "wye" }
 
-cat ./output-regtest/emit4/out.panpan
+cat ./output-reg-test/emit4/out.panpan
 { "NR": 1, "a": "pan", "b": "pan" }
 
-cat ./output-regtest/emit4/out.wyewye
+cat ./output-reg-test/emit4/out.wyewye
 { "NR": 1, "a": "pan", "b": "pan" }
 { "NR": 2, "a": "eks", "b": "pan" }
 { "NR": 3, "a": "wye", "b": "wye" }
@@ -2115,27 +2115,27 @@ NR=2,a=eks,b=pan
 NR=3,a=wye,b=wye
 NR=4,a=eks,b=wye
 
-cat ./output-regtest/emit4/err1
+cat ./output-reg-test/emit4/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > stderr, (@a, @b), "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit4/err2
+cat ./output-reg-test/emit4/err2
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit5/out.".$a.$b, @* ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit5/out.".$a.$b, @* ././reg-test/input/abixy
 
-cat ./output-regtest/emit5/out.ekspan
+cat ./output-reg-test/emit5/out.ekspan
 1=pan,2=eks
 1=pan,2=pan
 
-cat ./output-regtest/emit5/out.ekswye
+cat ./output-reg-test/emit5/out.ekswye
 1=pan,2=eks,3=wye,4=eks
 1=pan,2=pan,3=wye,4=wye
 
-cat ./output-regtest/emit5/out.panpan
+cat ./output-reg-test/emit5/out.panpan
 1=pan
 1=pan
 
-cat ./output-regtest/emit5/out.wyewye
+cat ./output-reg-test/emit5/out.wyewye
 1=pan,2=eks,3=wye
 1=pan,2=pan,3=wye
 
@@ -2159,27 +2159,27 @@ mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > stdout, @* ././reg-test/i
 1=pan,2=eks,3=wye,4=eks
 1=pan,2=pan,3=wye,4=wye
 
-cat ./output-regtest/emit5/err1
+cat ./output-reg-test/emit5/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > stderr, @* ././reg-test/input/abixy
 
-cat ./output-regtest/emit5/err2
+cat ./output-reg-test/emit5/err2
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit6/out.".$a.$b, all ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit6/out.".$a.$b, all ././reg-test/input/abixy
 
-cat ./output-regtest/emit6/out.ekspan
+cat ./output-reg-test/emit6/out.ekspan
 1=pan,2=eks
 1=pan,2=pan
 
-cat ./output-regtest/emit6/out.ekswye
+cat ./output-reg-test/emit6/out.ekswye
 1=pan,2=eks,3=wye,4=eks
 1=pan,2=pan,3=wye,4=wye
 
-cat ./output-regtest/emit6/out.panpan
+cat ./output-reg-test/emit6/out.panpan
 1=pan
 1=pan
 
-cat ./output-regtest/emit6/out.wyewye
+cat ./output-reg-test/emit6/out.wyewye
 1=pan,2=eks,3=wye
 1=pan,2=pan,3=wye
 
@@ -2203,21 +2203,21 @@ mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > stdout, all ././reg-test/
 1=pan,2=eks,3=wye,4=eks
 1=pan,2=pan,3=wye,4=wye
 
-cat ./output-regtest/emit6/err1
+cat ./output-reg-test/emit6/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > stderr, all ././reg-test/input/abixy
 
-cat ./output-regtest/emit6/err2
+cat ./output-reg-test/emit6/err2
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit7/out.".$a.$b, @*, "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit7/out.".$a.$b, @*, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit7/out.ekspan
+cat ./output-reg-test/emit7/out.ekspan
 NR=1,a=pan
 NR=2,a=eks
 NR=1,b=pan
 NR=2,b=pan
 
-cat ./output-regtest/emit7/out.ekswye
+cat ./output-reg-test/emit7/out.ekswye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
@@ -2227,11 +2227,11 @@ NR=2,b=pan
 NR=3,b=wye
 NR=4,b=wye
 
-cat ./output-regtest/emit7/out.panpan
+cat ./output-reg-test/emit7/out.panpan
 NR=1,a=pan
 NR=1,b=pan
 
-cat ./output-regtest/emit7/out.wyewye
+cat ./output-reg-test/emit7/out.wyewye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
@@ -2283,21 +2283,21 @@ NR=2,b=pan
 NR=3,b=wye
 NR=4,b=wye
 
-cat ./output-regtest/emit7/err1
+cat ./output-reg-test/emit7/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > stderr, @*, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit7/err2
+cat ./output-reg-test/emit7/err2
 
-mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-regtest/emit8/out.".$a.$b, all, "NR" ././reg-test/input/abixy
+mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > "./output-reg-test/emit8/out.".$a.$b, all, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit8/out.ekspan
+cat ./output-reg-test/emit8/out.ekspan
 NR=1,a=pan
 NR=2,a=eks
 NR=1,b=pan
 NR=2,b=pan
 
-cat ./output-regtest/emit8/out.ekswye
+cat ./output-reg-test/emit8/out.ekswye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
@@ -2307,11 +2307,11 @@ NR=2,b=pan
 NR=3,b=wye
 NR=4,b=wye
 
-cat ./output-regtest/emit8/out.panpan
+cat ./output-reg-test/emit8/out.panpan
 NR=1,a=pan
 NR=1,b=pan
 
-cat ./output-regtest/emit8/out.wyewye
+cat ./output-reg-test/emit8/out.wyewye
 NR=1,a=pan
 NR=2,a=eks
 NR=3,a=wye
@@ -2363,24 +2363,24 @@ NR=2,b=pan
 NR=3,b=wye
 NR=4,b=wye
 
-cat ./output-regtest/emit8/err1
+cat ./output-reg-test/emit8/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > stderr, all, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit8/err2
+cat ./output-reg-test/emit8/err2
 
-mlr head -n 4 then put -q emit > "./output-regtest/emit9/out.".$a.$b, $* ././reg-test/input/abixy
+mlr head -n 4 then put -q emit > "./output-reg-test/emit9/out.".$a.$b, $* ././reg-test/input/abixy
 
-cat ./output-regtest/emit9/out.ekspan
+cat ./output-reg-test/emit9/out.ekspan
 a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 
-cat ./output-regtest/emit9/out.ekswye
+cat ./output-reg-test/emit9/out.ekswye
 a=eks,b=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
 
-cat ./output-regtest/emit9/out.panpan
+cat ./output-reg-test/emit9/out.panpan
 a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533
 
-cat ./output-regtest/emit9/out.wyewye
+cat ./output-reg-test/emit9/out.wyewye
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit | "tr \[a-z\] \[A-Z\]", $*, "NR" ././reg-test/input/abixy
@@ -2395,24 +2395,24 @@ a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
 a=wye,b=wye,i=3,x=0.20460330576630303,y=0.33831852551664776
 a=eks,b=wye,i=4,x=0.38139939387114097,y=0.13418874328430463
 
-cat ./output-regtest/emit9/err1
+cat ./output-reg-test/emit9/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > stderr, $*, "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit9/err2
+cat ./output-reg-test/emit9/err2
 
-mlr head -n 4 then put -q emit > "./output-regtest/emit10/out.".$a.$b, mapexcept($*, "a", "b") ././reg-test/input/abixy
+mlr head -n 4 then put -q emit > "./output-reg-test/emit10/out.".$a.$b, mapexcept($*, "a", "b") ././reg-test/input/abixy
 
-cat ./output-regtest/emit10/out.ekspan
+cat ./output-reg-test/emit10/out.ekspan
 i=2,x=0.7586799647899636,y=0.5221511083334797
 
-cat ./output-regtest/emit10/out.ekswye
+cat ./output-reg-test/emit10/out.ekswye
 i=4,x=0.38139939387114097,y=0.13418874328430463
 
-cat ./output-regtest/emit10/out.panpan
+cat ./output-reg-test/emit10/out.panpan
 i=1,x=0.3467901443380824,y=0.7268028627434533
 
-cat ./output-regtest/emit10/out.wyewye
+cat ./output-reg-test/emit10/out.wyewye
 i=3,x=0.20460330576630303,y=0.33831852551664776
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit | "tr \[a-z\] \[A-Z\]", mapexcept($*, "a", "b"), "NR" ././reg-test/input/abixy
@@ -2443,9 +2443,9 @@ NR=i,_=4
 NR=x,_=0.38139939387114097
 NR=y,_=0.13418874328430463
 
-cat ./output-regtest/emit10/err1
+cat ./output-reg-test/emit10/err1
 
 mlr head -n 4 then put -q @a[NR]=$a; @b[NR]=$b; emit > stderr, mapexcept($*, "a", "b"), "NR" ././reg-test/input/abixy
 
-cat ./output-regtest/emit10/err2
+cat ./output-reg-test/emit10/err2
 
diff --git a/go/reg-test/expected/case-c-in-place-processing.sh.out b/go/reg-test/expected/case-c-in-place-processing.sh.out
index 54e018673..f33489f8d 100644
--- a/go/reg-test/expected/case-c-in-place-processing.sh.out
+++ b/go/reg-test/expected/case-c-in-place-processing.sh.out
@@ -1,5 +1,5 @@
 
-cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/abixy.temp1
+cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/abixy.temp1
 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
@@ -11,7 +11,7 @@ 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
 
-cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/abixy.temp2
+cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/abixy.temp2
 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
@@ -23,14 +23,14 @@ 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 -I --opprint head -n 2 /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/abixy.temp1 /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/abixy.temp2
+mlr -I --opprint head -n 2 /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/abixy.temp1 /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/abixy.temp2
 
-cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/abixy.temp1
+cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/abixy.temp1
 a   b   i x                  y
 pan pan 1 0.3467901443380824 0.7268028627434533
 eks pan 2 0.7586799647899636 0.5221511083334797
 
-cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/abixy.temp2
+cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/abixy.temp2
 a   b   i x                  y
 pan pan 1 0.3467901443380824 0.7268028627434533
 eks pan 2 0.7586799647899636 0.5221511083334797
@@ -38,10 +38,10 @@ eks pan 2 0.7586799647899636 0.5221511083334797
 mlr -I --opprint head -n 2
 mlr: -I option (in-place operation) requires input files.
 
-mlr -I --opprint -n head -n 2 /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/abixy.temp1
+mlr -I --opprint -n head -n 2 /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/abixy.temp1
 mlr: -I option (in-place operation) requires input files.
 
-cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/abixy.temp1
+cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/abixy.temp1
 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
@@ -53,7 +53,7 @@ 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
 
-cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/abixy.temp2
+cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/abixy.temp2
 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
@@ -65,9 +65,9 @@ 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 -I --opprint rename a,AYE,b,BEE /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/abixy.temp1 /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/abixy.temp2
+mlr -I --opprint rename a,AYE,b,BEE /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/abixy.temp1 /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/abixy.temp2
 
-cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/abixy.temp1
+cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/abixy.temp1
 AYE BEE i  x                   y
 pan pan 1  0.3467901443380824  0.7268028627434533
 eks pan 2  0.7586799647899636  0.5221511083334797
@@ -80,7 +80,7 @@ zee wye 8  0.5985540091064224  0.976181385699006
 hat wye 9  0.03144187646093577 0.7495507603507059
 pan wye 10 0.5026260055412137  0.9526183602969864
 
-cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/abixy.temp2
+cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/abixy.temp2
 AYE BEE i  x                   y
 pan pan 1  0.3467901443380824  0.7268028627434533
 eks pan 2  0.7586799647899636  0.5221511083334797
diff --git a/go/reg-test/expected/case-c-skip-pass-comments.sh.out b/go/reg-test/expected/case-c-skip-pass-comments.sh.out
index a5fe008e1..dcf4be3e8 100644
--- a/go/reg-test/expected/case-c-skip-pass-comments.sh.out
+++ b/go/reg-test/expected/case-c-skip-pass-comments.sh.out
@@ -154,7 +154,7 @@ mlr termcvt --lf2crlf
 
 
 ---------------------------------------------------------------- input comments1-crlf.dkvp
-cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.dkvp
+cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.dkvp
 # hello world 1
 a=1,b=2,c=3
 a=4,b=5,c=6
@@ -170,7 +170,7 @@ a 4
 b 5
 c 6
 
-mlr --skip-comments --idkvp --oxtab cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.dkvp
+mlr --skip-comments --idkvp --oxtab cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.dkvp
 a 1
 b 2
 c 3
@@ -191,7 +191,7 @@ a 4
 b 5
 c 6
 
-mlr --pass-comments --idkvp --oxtab cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.dkvp
+mlr --pass-comments --idkvp --oxtab cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.dkvp
 # hello world 1
 a 1
 b 2
@@ -507,7 +507,7 @@ mlr termcvt --lf2crlf
 
 
 ---------------------------------------------------------------- input comments1-crlf.nidx
-cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.nidx
+cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.nidx
 # hello world 1
 aX1 bX2 cX3
 aX4 bX5 cX6
@@ -523,7 +523,7 @@ mlr --skip-comments --inidx --oxtab cat
 2 bX5
 3 cX6
 
-mlr --skip-comments --inidx --oxtab cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.nidx
+mlr --skip-comments --inidx --oxtab cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.nidx
 1 aX1
 2 bX2
 3 cX3
@@ -544,7 +544,7 @@ mlr --pass-comments --inidx --oxtab cat
 2 bX5
 3 cX6
 
-mlr --pass-comments --inidx --oxtab cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.nidx
+mlr --pass-comments --inidx --oxtab cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.nidx
 # hello world 1
 1 aX1
 2 bX2
@@ -649,7 +649,7 @@ mlr termcvt --lf2crlf
 
 
 ---------------------------------------------------------------- input comments1-crlf.json
-cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.json
+cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.json
 # hello world 1
 { "a":1, "b":2, "c":3 }
 { "a":4, "b":5, "c":6 }
@@ -660,7 +660,7 @@ mlr --skip-comments --ijson --odkvp cat
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --skip-comments --ijson --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.json
+mlr --skip-comments --ijson --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.json
 a=1,b=2,c=3
 a=4,b=5,c=6
 
@@ -671,7 +671,7 @@ mlr --pass-comments --ijson --odkvp cat
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --pass-comments --ijson --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.json
+mlr --pass-comments --ijson --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.json
 # hello world 1
 a=1,b=2,c=3
 a=4,b=5,c=6
@@ -769,7 +769,7 @@ mlr termcvt --lf2crlf
 
 
 ---------------------------------------------------------------- input comments1-crlf.xtab
-cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.xtab
+cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.xtab
 x 1
 #hello world3
 z 3
@@ -785,7 +785,7 @@ mlr --skip-comments --ixtab --odkvp cat
 x=1,z=3
 x=2,z=5
 
-mlr --skip-comments --ixtab --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.xtab
+mlr --skip-comments --ixtab --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.xtab
 x=1,z=3
 x=2,z=5
 
@@ -797,7 +797,7 @@ x=1,z=3
 #hello world4
 x=2,z=5
 
-mlr --pass-comments --ixtab --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.xtab
+mlr --pass-comments --ixtab --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.xtab
 #hello world3
 x=1,z=3
 #hello world4
@@ -880,7 +880,7 @@ mlr termcvt --lf2crlf
 
 
 ---------------------------------------------------------------- input comments1-crlf.csv
-cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.csv
+cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.csv
 # hello
 a,b,c
 1,2,3
@@ -892,7 +892,7 @@ mlr --skip-comments --icsvlite --odkvp cat
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --skip-comments --icsvlite --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.csv
+mlr --skip-comments --icsvlite --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.csv
 a=1,b=2,c=3
 a=4,b=5,c=6
 
@@ -903,7 +903,7 @@ mlr --pass-comments --icsvlite --odkvp cat
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --pass-comments --icsvlite --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.csv
+mlr --pass-comments --icsvlite --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.csv
 # hello
 a=1,b=2,c=3
 a=4,b=5,c=6
@@ -985,7 +985,7 @@ mlr termcvt --lf2crlf
 
 
 ---------------------------------------------------------------- input comments1-crlf.csv
-cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.csv
+cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.csv
 # hello
 a,b,c
 1,2,3
@@ -997,7 +997,7 @@ mlr --skip-comments --icsv --odkvp cat
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --skip-comments --icsv --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.csv
+mlr --skip-comments --icsv --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.csv
 a=1,b=2,c=3
 a=4,b=5,c=6
 
@@ -1008,7 +1008,7 @@ mlr --pass-comments --icsv --odkvp cat
 a=1,b=2,c=3
 a=4,b=5,c=6
 
-mlr --pass-comments --icsv --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-regtest/comments1-crlf.csv
+mlr --pass-comments --icsv --odkvp cat /Users/kerl/pub_http_internet/miller-releases/miller-head/c/output-reg-test/comments1-crlf.csv
 # hello
 a=1,b=2,c=3
 a=4,b=5,c=6
diff --git a/go/reg-test/run b/go/reg-test/run
index ae8e61dfd..f82d07f6e 100755
--- a/go/reg-test/run
+++ b/go/reg-test/run
@@ -144,8 +144,8 @@ fi
 # Input/output locations
 indir=$ourdir/input
 expdir=$ourdir/expected
-outdir=$pwd/output-regtest
-reloutdir=./output-regtest
+outdir=$pwd/output-reg-test
+reloutdir=./output-reg-test
 
 verbose="false"
 case_file_names="" # None means all
diff --git a/go/todo.txt b/go/todo.txt
index 135f03714..ca61fbaea 100644
--- a/go/todo.txt
+++ b/go/todo.txt
@@ -20,6 +20,7 @@ no need to bootstrap a parser for the parser-generator language
   - diff the *.err files -- ?
   ! move u/* data files to $indir
   - double-check c/go sieve.mlr parse/execute ok
+  - easier differ -- C5 optional or something
 
 * justWroteEmptyLine -> pprint too ...