patch 8.2.0958: not sufficient testing for buffer writing Commit: https://github.com/vim/vim/commit/1de5f7c81d5e78fb4d612134bd2dfa6ee9183fae Author: Bram Moolenaar <Bram@vim.org> Date: Thu Jun 11 19:22:43 2020 +0200 patch 8.2.0958: not sufficient testing for buffer writing Problem: Not sufficient testing for buffer writing. Solution: Add a few tests. (Yegappan Lakshmanan, closes https://github.com/vim/vim/issues/6238)