patch 8.2.3846: no error when using control character for 'lcs' or 'fcs' Commit: https://github.com/vim/vim/commit/60618c8f1a7ea55452837a446525272142286471 Author: zeertzjq <zeertzjq@outlook.com> Date: Sat Dec 18 15:32:46 2021 +0000 patch 8.2.3846: no error when using control character for 'lcs' or 'fcs' Problem: No error when using control character for 'lcs' or 'fcs'. Solution: Use char2cells() to check the width. (closes https://github.com/vim/vim/issues/9369)