patch 8.2.1097: highlight code not sufficiently tested Commit: https://github.com/vim/vim/commit/de8f0f47f653ff10bd8cc12b3e0817ed5bdf64ea Author: Bram Moolenaar <Bram@vim.org> Date: Tue Jun 30 18:45:43 2020 +0200 patch 8.2.1097: highlight code not sufficiently tested Problem: Highlight code not sufficiently tested. Solution: Add a few more tests. (Yegappan Lakshmanan, closes https://github.com/vim/vim/issues/6359)