Url typo (double /)

Signed-off-by: Marco <marco.guerrini@outlook.com>

Author: gremirarunico

user_guide_src/source/incoming/routing/030.php

@@ -7,4 +7,4 @@
 
 <!-- Generate the URI to link to user ID 15, gallery 12: -->
 <a href="<?= url_to('user_gallery', 15, 12) ?>">View Gallery</a>
-<!-- Result: 'http://example.com//users/15/gallery/12' -->
+<!-- Result: 'http://example.com/users/15/gallery/12' -->