Fixed inadequate escaping bug.

module/VuFind/src/VuFind/View/Helper/Root/JqueryValidation.php

@@ -79,7 +79,7 @@ class JqueryValidation extends AbstractHelper
                 $output .= ',';
             }
             $translator = $this->getView()->plugin('translate');
-            $message = $translator($message);
+            $message = addslashes($translator($message));
             $output .= "$rule:'$message'";
             $first = false;
         }