Merge pull request #74777 from lawnjelly/textedit_lineinregion

[3.x] Fix TextEdit color_region_cache bug

scene/gui/text_edit.cpp

@@ -5488,7 +5488,7 @@ int TextEdit::_is_line_in_region(int p_line) {
 	// If not find the closest line we have.
 	int previous_line = p_line - 1;
 	for (; previous_line > -1; previous_line--) {
-		if (color_region_cache.has(p_line)) {
+		if (color_region_cache.has(previous_line)) {
 			break;
 		}
 	}