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)

--- a/src/spellsuggest.c
+++ b/src/spellsuggest.c
@@ -538,7 +538,8 @@ spell_suggest(int count)
     // Get the word and its length.
 
     // Figure out if the word should be capitalised.
-    need_cap = check_need_cap(curwin->w_cursor.lnum, curwin->w_cursor.col);
+    need_cap = check_need_cap(curwin, curwin->w_cursor.lnum,
+							curwin->w_cursor.col);
 
     // Make a copy of current line since autocommands may free the line.
     line = vim_strsave(ml_get_curline());