🐛 CodeEdit - Fix ArgumentOutOfRangeException on multiline removal (#72)

Author: valkyrienyanko

src/SharpIDE.Godot/Features/CodeEditor/SharpIdeCodeEdit.cs

@@ -151,8 +151,15 @@ private void OnLinesEditedFrom(long fromLine, long toLine)
 		if (_settingWholeDocumentTextSuppressLineEditsEvent) return;
 		var fromLineText = GetLine((int)fromLine);
 		var caretPosition = this.GetCaretPosition();
-		var textFrom0ToCaret = fromLineText[..caretPosition.col];
 		var caretPositionEnum = LineEditOrigin.Unknown;
+
+		if (caretPosition.line != (int)fromLine || caretPosition.col < 0 || caretPosition.col > fromLineText.Length)
+		{
+			_syntaxHighlighter.LinesChanged(fromLine, toLine, caretPositionEnum);
+			return;
+		}
+
+		var textFrom0ToCaret = fromLineText[..caretPosition.col];
 		if (string.IsNullOrWhiteSpace(textFrom0ToCaret))
 		{
 			caretPositionEnum = LineEditOrigin.StartOfLine;