patch 8.2.0644: insufficient testing for invalid function arguments Commit: https://github.com/vim/vim/commit/99fa721944dda9d07c53c907c33466728df5c271 Author: Bram Moolenaar <Bram@vim.org> Date: Sun Apr 26 15:59:55 2020 +0200 patch 8.2.0644: insufficient testing for invalid function arguments Problem: Insufficient testing for invalid function arguments. Solution: Add more tests. (Yegappan Lakshmanan, closes https://github.com/vim/vim/issues/5988)