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)

|x+0&#ffffff0@2| |y+2&#ffff4012|y+2&#e0e0e08@1| +0&&|z@2| | +0&#ffffff0@27
|x+0&#e0e0e08@2| |y+2&&@2| +0&&|z@2| | +0&#ffffff0@27
|x+0&#e0e0e08@2| |y+2&&>y+2&#ffff4012@1| +0&#ffffff0|z@2| @28
|~+0#4040ff13&| @38
|~| @38
|-+2#0000000&@1| |V|I|S|U|A|L| |-@1|3+0&&| @8|3|,|6| @10|A|l@1|