patch 9.0.2126: unused assignments when checking 'listchars' Commit: https://github.com/vim/vim/commit/00624a2fa08d04bdded240d474e9cfdc193dbe10 Author: zeertzjq <zeertzjq@outlook.com> Date: Thu Nov 23 20:47:16 2023 +0100 patch 9.0.2126: unused assignments when checking 'listchars' Problem: Unused assignments when checking the value of 'listchars'. Solution: Loop only once when just checking the value. Add a test to check that this change doesn't cause double-free. closes: #13559 Signed-off-by: zeertzjq <zeertzjq@outlook.com> Signed-off-by: Christian Brabandt <cb@256bit.org>