[PATCH] Fix check for whitespace in $PATH or $HOME (in test script regress/ssh-tty.sh)

[Jens Rosenboom]

This fixes the test for whitespace in $PATH or $HOME in regress/ssh-tty.sh.
*\t* seems to test for character 't', not for tab. In my case the check 
was always true and the tests were always skipped.
[[:space:]] should do better and (according to chatgpt and claude) is 
defined by POSIX.

---
  regress/ssh-tty.sh | 7 +++++--
  1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/regress/ssh-tty.sh b/regress/ssh-tty.sh
index 07053d13b..fcfa27e44 100644
--- a/regress/ssh-tty.sh
+++ b/regress/ssh-tty.sh
@@ -10,8 +10,11 @@ FAKEHOME="$OBJ/.fakehome"
  rm -rf "$FAKEHOME"
  mkdir -m 0700 -p "$FAKEHOME"

-case "${PATH}${HOME}" in
-*\ *|*\t*) skip "\$PATH or \$HOME has whitespace, not supported in this 
test";;
+case "${PATH}" in
+*[[:space:]]*) skip "\$PATH ($PATH) has whitespace, not supported in 
this test";;
+esac
+case "${HOME}" in
+*[[:space:]]*) skip "\$HOME ($HOME) has whitespace, not supported in 
this test";;
  esac

  # tmux stuff
-- 
2.55.0