feature #2558 added documentation

src/static/js/AttributeManager.js

@@ -168,6 +168,8 @@ AttributeManager.prototype = _(AttributeManager.prototype).extend({
   /*
     Gets all attributes at caret position 
     if the user selected a range, the start of the selection is taken
+    returns a list of attributes in the format 
+    [ ["key","value"], ["key","value"], ...  ]
   */
   getAttributesOnCaret: function(){
     return this.getAttributesOnPosition(this.rep.selStart[0], this.rep.selStart[1]);