Ticket #47862: 47862.diff

link-template.php

@@ -1249 +1249 @@
  * @since 3.1.0
  *
  * @param string $post_type Post type
- * @param string $feed      Optional. Feed type. Default empty.
+ * @param string $feed      Optional. Feed type. f $feed is empty, the result of get_default_feed() is used
+ *                          (the default feed is 'rss2', unless it is changed via the default_feed filter).
+ *                          Default empty.
  * @return string|false The post type feed permalink.
  */
 function get_post_type_archive_feed_link( $post_type, $feed = '' ) {