Improve doc-comment message

media/js/discipline/editStructure.js

@@ -35,7 +35,7 @@ $(document).ready(function () {
 
 
     // CSS class must be added to module / submodule
-    // DOM-nodes that contains some data-*
+    // DOM-nodes that contains some data-* attributes
     const DATA_CLASS = '_info';
 
     /** Get the nearest module node and return its data */