diff --git a/core/modules/system/js/system.date.js b/core/modules/system/js/system.date.js
index 4f34a7b..fcab3ef 100644
--- a/core/modules/system/js/system.date.js
+++ b/core/modules/system/js/system.date.js
@@ -9,10 +9,10 @@
    */
   Drupal.behaviors.dateFormat = {
     attach: function (context) {
-      var $context = $(context),
-          $source = $context.find('[data-drupal-date-formatter="source"]').once('dateFormat'),
-          $target = $context.find('[data-drupal-date-formatter="preview"]').once('dateFormat'),
-          $preview = $target.find('em');
+      var $context = $(context);
+      var $source = $context.find('[data-drupal-date-formatter="source"]').once('dateFormat');
+      var $target = $context.find('[data-drupal-date-formatter="preview"]').once('dateFormat');
+      var $preview = $target.find('em');
 
       // All elements have to exist.
       if (!$source.length || !$target.length) {
@@ -25,8 +25,8 @@
        * @param {object} e
        */
       function dateFormatHandler(e) {
-        var baseValue = $(e.target).val() || '',
-            dateString = baseValue.replace(/\\?(.?)/gi, function (key, value) {
+        var baseValue = $(e.target).val() || '';
+        var dateString = baseValue.replace(/\\?(.?)/gi, function (key, value) {
           return dateFormats[key] ? dateFormats[key] : value;
         });