patch 8.2.1954: Vim9: not all command modifiers are tested Commit: https://github.com/vim/vim/commit/f65b35b4465d3622128bd82bd3775f833542eb1f Author: Bram Moolenaar <Bram@vim.org> Date: Wed Nov 4 18:02:44 2020 +0100 patch 8.2.1954: Vim9: not all command modifiers are tested Problem: Vim9: not all command modifiers are tested. Solution: Add tests for "keep" modifiers. Fix that marks are lost even though ":lockmarks" is used.

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