No need for quotes and escaping anymore.

enum_editor.php

@@ -19,7 +19,7 @@ require_once './libraries/header_meta_style.inc.php';
     <form action="enum_editor.php" method="get">
         <div id="enum_editor_no_js">
             <h3><?php printf(__('Values for the column "%s"'), htmlspecialchars($_GET['field'])); ?></h3>
-            <p><?php echo __('Enter each value in a separate field, enclosed in single quotes. If you ever need to put a backslash ("\") or a single quote ("\'") amongst those values, precede it with a backslash (for example \'\\\\xyz\' or \'a\\\'b\').'); ?></p>
+            <p><?php echo __('Enter each value in a separate field.'); ?></p>
             <div id="values">
             <?php
                 $values = array();