patch 8.1.1838: there is :spellwrong and :spellgood but not :spellrare commit https://github.com/vim/vim/commit/08cc374dabd2a02785129fa1c0100f7745c244ad Author: Bram Moolenaar <Bram@vim.org> Date: Sun Aug 11 22:51:14 2019 +0200 patch 8.1.1838: there is :spellwrong and :spellgood but not :spellrare Problem: There is :spellwrong and :spellgood but not :spellrare. Solution: Add :spellrare. (Martin Tournoij, closes https://github.com/vim/vim/issues/4291)

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