Ticket #30296: 30296-space.diff

functions.php

@@ -294 +294 @@
  */
 function twentyfifteen_nav_description( $item_output, $item, $depth, $args ) {
         if ( 'primary' == $args->theme_location && $item->description ) {
-                $item_output = str_replace( $args->link_after . '</a>', '<span class="menu-item-description">' . $item->description . '</span>' . $args->link_after . '</a>', $item_output );
+                $item_output = str_replace( $args->link_after . '</a>', ' <span class="menu-item-description">' . $item->description . '</span>' . $args->link_after . '</a>', $item_output );
         }
 
         return $item_output;