patch 8.2.3174: Vim9: "legacy undo" finds "undo" variable Commit: https://github.com/vim/vim/commit/47bc9c333766ee3d45cb18c583a630e4ad53405a Author: Bram Moolenaar <Bram@vim.org> Date: Sat Jul 17 21:24:56 2021 +0200 patch 8.2.3174: Vim9: "legacy undo" finds "undo" variable Problem: Vim9: "legacy undo" finds "undo" variable. Solution: Do not pass lookup function to find_ex_command(). (closes https://github.com/vim/vim/issues/8563)