patch 8.2.3989: some insert completion code is not tested Commit: https://github.com/vim/vim/commit/e982586f8eebf2b055987218f6d3f7a084c4bf69 Author: Yegappan Lakshmanan <yegappan@yahoo.com> Date: Mon Jan 3 11:03:48 2022 +0000 patch 8.2.3989: some insert completion code is not tested Problem: Some insert completion code is not tested. Solution: Add a few tests. Refactor thesaurus completion. (Yegappan Lakshmanan, closes #9460)

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