patch 9.0.1578: SpellCap highlight not always updated when needed Commit: https://github.com/vim/vim/commit/2ac6497f0ef186f0e3ba67d7f0a485bfb612bb08 Author: Luuk van Baal <luukvbaal@gmail.com> Date: Thu May 25 17:14:42 2023 +0100 patch 9.0.1578: SpellCap highlight not always updated when needed Problem: SpellCap highlight not always updated when needed. Solution: Handle updating line below closed fold and other situations where only part of the window is redrawn. (Luuk van Baal, closes #12428, closes #12420)

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