improve the code as per js coding standard

Author: DhruvBasan

lib/web/mage/backend/tree-suggest.js

@@ -55,8 +55,8 @@ define([
         /**
          * @override
          */
-        init: function (el,options) {
-            init.call(this,el,options);
+        init: function (el, options) {
+            init.call(this, el, options);
             this.get_container()
                 .show()
                 .on('keydown', $.proxy(function (e) {