diff --git a/core/modules/ckeditor/js/ckeditor.js b/core/modules/ckeditor/js/ckeditor.js
index 892621f..bfc560a 100644
--- a/core/modules/ckeditor/js/ckeditor.js
+++ b/core/modules/ckeditor/js/ckeditor.js
@@ -89,20 +89,20 @@
         // A temporary workaround to control scrollbar appearance when using
         // autoGrow event to control editor's height.
         // @todo Remove when http://dev.ckeditor.com/ticket/12120 is fixed.
-        editor.on('mode', function() {
+        editor.on('mode', function () {
           var editable = editor.editable();
           if (!editable.isInline()) {
-            editor.on('autoGrow', function( evt ) {
-              var doc = evt.editor.document,
-                  scrollable = CKEDITOR.env.quirks ? doc.getBody() : doc.getDocumentElement();
+            editor.on('autoGrow', function (evt) {
+              var doc = evt.editor.document;
+              var scrollable = CKEDITOR.env.quirks ? doc.getBody() : doc.getDocumentElement();
 
-              if ( scrollable.$.scrollHeight < scrollable.$.clientHeight ) {
-                scrollable.setStyle( 'overflow-y', 'hidden' );
+              if (scrollable.$.scrollHeight < scrollable.$.clientHeight) {
+                scrollable.setStyle('overflow-y', 'hidden');
               }
               else {
-                scrollable.removeStyle( 'overflow-y' );
+                scrollable.removeStyle('overflow-y');
               }
-            }, null, null, 10000 );
+            }, null, null, 10000);
           }
         });
       }
@@ -294,7 +294,7 @@
   });
 
   // Formulate a default formula for the maximum autoGrow height.
-  $(document).on('drupalViewportOffsetChange', function() {
+  $(document).on('drupalViewportOffsetChange', function () {
     CKEDITOR.config.autoGrow_maxHeight = 0.7 * (window.innerHeight - displace.offsets.top - displace.offsets.bottom);
   });