Ticket #26819: 26819.patch

src/wp-includes/formatting.php

@@ -3073 +3073 @@
  * @return string Absolute path.
  */
 function wp_make_link_relative( $link ) {
-        return preg_replace( '|https?://[^/]+(/.*)|i', '$1', $link );
+        return preg_replace( '|https?://[^/]+(/?.*)|i', '$1', $link );
 }
 
 /**