patch 8.2.4628: not enough testing for 2/3 letter substitute commands Commit: https://github.com/vim/vim/commit/5e877baf87530d5c4fe4da2c5a6269cf19526c27 Author: Yegappan Lakshmanan <yegappan@yahoo.com> Date: Fri Mar 25 21:19:26 2022 +0000 patch 8.2.4628: not enough testing for 2/3 letter substitute commands Problem: Not enough testing for 2/3 letter substitute commands. Solution: Add more tests. (Yegappan Lakshmanan, closes https://github.com/vim/vim/issues/10019)