Ticket #18765: formatting.php.diff

formatting.php

@@ -2372 +2372 @@
  * @return string
  */
 function tag_escape($tag_name) {
-        $safe_tag = strtolower( preg_replace('/[^a-zA-Z_:]/', '', $tag_name) );
+        $safe_tag = strtolower( preg_replace('/[^a-zA-Z0-9_:]/', '', $tag_name) );
         return apply_filters('tag_escape', $safe_tag, $tag_name);
 }