Docs.

packages/ckeditor5-theme-lark/theme/ckeditor5-widget/widgettypearound.css

@@ -193,13 +193,16 @@
 	}
 }
 
-/* In a RTL environment, the selection handler is aligned to the right side of the widget */
+/*
+ * Styles for the "before" button when the widget has a selection handle in an RTL environment.
+ * The selection handler is aligned to the right side of the widget so there is no need to create
+ * additional space for it next to the "before" button.
+ */
 .ck[dir="rtl"] .ck-widget.ck-widget_with-selection-handle .ck-widget__type-around > .ck-widget__type-around__button_before {
 	margin-left: 0;
 	margin-right: 20px;
 }
 
-
 /*
  * Hide type around buttons when the widget is selected as a child of a selected
  * nested editable (e.g. mulit-cell table selection).