Reproducer:
IFS=/
set a b c
cat <<EOF
$*
EOF
Actual output: a b c
Expected output: a/b/c
In any context in which field splitting is not possible, POSIX specifies that
$* uses the first character of $IFS as the output field separator.
Here-documents are such a context.
I am fixing the same bug in ksh93 right now. Other shells (dash, mksh, yash,
zsh) act correctly.
Interestingly, $* in a here-string already works correctly on both:
$ bash -c 'IFS=/; set a b c; cat <<<$*'
a/b/c
$ ksh93 -c 'IFS=/; set a b c; cat <<<$*'
a/b/c
--
|| modernish -- harness the shell
|| https://github.com/modernish/modernish
||
|| KornShell lives!
|| https://github.com/ksh93/ksh
