8176458: Revise default document styling

Reviewed-by: prr, serb, mschoene

src/share/classes/javax/swing/text/DefaultEditorKit.java

@@ -109,7 +109,7 @@ public class DefaultEditorKit extends EditorKit {
      * @return the command list
      */
     public Action[] getActions() {
-        return defaultActions;
+        return defaultActions.clone();
     }
 
     /**