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)

|<+0#4040ff13#ffffff0@2|e+0#0000000#ffd7ff255|r|t| |b|e|l|o|w| +0&#ffffff0@47
|"| |l|i|n|e| |8| @51
>"| |l|i|n|e| |9| @51
|i+0&#ffd7ff255|n|s|e|r|t| |b|e|l|o|w| |1| +0&#ffffff0@45
|i+0&#ffd7ff255|n|s|e|r|t| |b|e|l|o|w| |2| +0&#ffffff0@45
|"| |l|i|n|e| |1|0| @50
|~+0#4040ff13&| @58
| +0#0000000&@41|9|,|1| @10|B|o|t|