Issue #735528 follow-up by attiks: Do not backport span -> attr change.

misc/states.js

@@ -492,7 +492,7 @@ $(document).bind('state:disabled', function(e) {
 $(document).bind('state:required', function(e) {
   if (e.trigger) {
     if (e.value) {
-      $(e.target).closest('.form-item, .form-wrapper').find('label').append('<abbr class="form-required" title="' + Drupal.t('This field is required.') + '">*</abbr>');
+      $(e.target).closest('.form-item, .form-wrapper').find('label').append('<span class="form-required">*</span>');
     }
     else {
       $(e.target).closest('.form-item, .form-wrapper').find('label .form-required').remove();