patch 8.2.3818: cannot filter or map characters in a string Commit: https://github.com/vim/vim/commit/c479ce032f5d4d14bab9e479acbf42d758879893 Author: rbtnn <naru123456789@gmail.com> Date: Wed Dec 15 19:14:54 2021 +0000 patch 8.2.3818: cannot filter or map characters in a string Problem: Cannot filter or map characters in a string. Solution: Make filter() and map() work on a string. (Naruhiko Nishino, closes #9327)