
mlr cat then cat ./reg-test/input/short
a=1
b=2
c=3

mlr cat then tac ./reg-test/input/short
c=3
b=2
a=1

mlr tac then cat ./reg-test/input/short
c=3
b=2
a=1

mlr tac then tac ./reg-test/input/short
a=1
b=2
c=3

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
c=3
b=2
a=1

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
a=1
b=2
c=3

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
a=1
b=2
c=3

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
c=3
b=2
a=1

mlr then cat then head -n 2 -g a,b then tac ./reg-test/input/abixy-het
a=pan,b=wye,i=10,x=0.5026260055412137,y=0.9526183602969864
a=zee,b=wye,i=8,x=0.5985540091064224,yyy=0.976181385699006
a=eks,b=zee,iii=7,x=0.6117840605678454,y=0.1878849191181694
a=zee,b=pan,i=6,x=0.5271261600918548,y=0.49322128674835697
a=wye,b=pan,i=5,xxx=0.5732889198020006,y=0.8636244699032729
a=eks,b=pan,i=2,x=0.7586799647899636,y=0.5221511083334797
a=pan,b=pan,i=1,x=0.3467901443380824,y=0.7268028627434533

