Index: src/wp-includes/shortcodes.php
===================================================================
--- src/wp-includes/shortcodes.php	(revision 39346)
+++ src/wp-includes/shortcodes.php	(working copy)
@@ -244,6 +244,7 @@
  * 6 - An extra ] to allow for escaping shortcodes with double [[]]
  *
  * @since 2.5.0
+ * @since 4.4.0 The `$tagnames` argument was added.
  *
  * @global array $shortcode_tags
  *