parallel/unittest/wanted-results/test25

### Test basic --arg-sep
a
b
### Run commands using --arg-sep
echo a
a
echo b
b
### Change --arg-sep
echo a
a
echo b
b
echo a
a
echo b
b
### Test stdin goes to first command only
cat -
via first cat
cat -
cat
via cat
echo b
b
cat
via cat
echo b
b
echo a
a
cat