Docs: Add missing descriptions to wp_nav_menu_max_depth() and do_core_upgrade().

Developed in WordPress#10570

Follow-up to [61512], [32642], [32654].

Props rejaulalomkhan, westonruter, huzaifaalmesbah.
See #64224.


git-svn-id: https://develop.svn.wordpress.org/trunk@61520 602fd350-edb4-49c9-b593-d223f7449a82

Author: westonruter

src/wp-admin/nav-menus.php

@@ -672,12 +672,14 @@
 }
 
 /**
+ * Adds a CSS class to display the max depth of the navigation menu.
+ *
  * @since 3.0.0
  *
- * @global int $_wp_nav_menu_max_depth
+ * @global int $_wp_nav_menu_max_depth Maximum depth of the navigation menu.
  *
- * @param string $classes
- * @return string
+ * @param string $classes Existing CSS classes for the body tag.
+ * @return string Modified CSS classes including the menu max depth class.
  */
 function wp_nav_menu_max_depth( $classes ) {
 	global $_wp_nav_menu_max_depth;

src/wp-admin/update-core.php

@@ -840,7 +840,7 @@ function list_translation_updates() {
  *
  * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
  *
- * @param bool $reinstall
+ * @param bool $reinstall Optional. Whether to reinstall WordPress. Default false.
  */
 function do_core_upgrade( $reinstall = false ) {
 	global $wp_filesystem;