chore: dart fixes

lib/src/models/config/toolbar/simple_toolbar_configurations.dart

@@ -218,8 +218,8 @@ class QuillSimpleToolbarConfigurations extends QuillSharedToolbarProperties {
   final bool showClipboardCopy;
   final bool showClipboardPaste;
 
-  /// This activates a functionality that is only implemented in [flutter_quill] and is NOT originally 
+  /// This activates a functionality that is only implemented in [flutter_quill] and is NOT originally
-  /// used in the [Quill Js API]. So it could cause conflicts if you use this attribute with the original Delta format of Quill Js 
+  /// used in the [Quill Js API]. So it could cause conflicts if you use this attribute with the original Delta format of Quill Js
   final bool showLineHeightButton;
 
   /// Toolbar items to display for controls of embed blocks