diff --git a/src/wp-includes/nav-menu-template.php b/src/wp-includes/nav-menu-template.php
index 5d28e5b492..b95c8a3d0a 100644
--- a/src/wp-includes/nav-menu-template.php
+++ b/src/wp-includes/nav-menu-template.php
@@ -198,28 +198,33 @@ class Walker_Nav_Menu extends Walker {
 /**
  * Displays a navigation menu.
  *
- * Optional $args contents:
- *
- * menu - The menu that is desired. Accepts (matching in order) id, slug, name. Defaults to blank.
- * menu_class - CSS class to use for the ul element which forms the menu. Defaults to 'menu'.
- * menu_id - The ID that is applied to the ul element which forms the menu. Defaults to the menu slug, incremented.
- * container - Whether to wrap the ul, and what to wrap it with. Defaults to 'div'.
- * container_class - the class that is applied to the container. Defaults to 'menu-{menu slug}-container'.
- * container_id - The ID that is applied to the container. Defaults to blank.
- * fallback_cb - If the menu doesn't exists, a callback function will fire. Defaults to 'wp_page_menu'. Set to false for no fallback.
- * before - Text before the link text.
- * after - Text after the link text.
- * link_before - Text before the link.
- * link_after - Text after the link.
- * echo - Whether to echo the menu or return it. Defaults to echo.
- * depth - how many levels of the hierarchy are to be included. 0 means all. Defaults to 0.
- * walker - allows a custom walker to be specified.
- * theme_location - the location in the theme to be used. Must be registered with register_nav_menu() in order to be selectable by the user.
- * items_wrap - How the list items should be wrapped. Defaults to a ul with an id and class. Uses printf() format with numbered placeholders.
- *
  * @since 3.0.0
  *
- * @param array $args Arguments
+ * @param array $args {
+ *     Optional. Array of nav menu arguments.
+ *
+ *     @type string        $menu            Desired menu. Accepts (matching in order) id, slug, name. Default empty.
+ *     @type string        $menu_class      CSS class to use for the ul element which forms the menu. Default 'menu'.
+ *     @type string        $menu_id         The ID that is applied to the ul element which forms the menu.
+ *                                          Default is the menu slug, incremented.
+ *     @type string        $container       Whether to wrap the ul, and what to wrap it with. Default 'div'.
+ *     @type string        $container_class Class that is applied to the container. Default 'menu-{menu slug}-container'.
+ *     @type string        $container_id    The ID that is applied to the container. Default empty.
+ *     @type callback|bool $fallback_cb     If the menu doesn't exists, a callback function will fire.
+ *                                          Default is 'wp_page_menu'. Set to false for no fallback.
+ *     @type string        $before          Text before the link text. Default empty.
+ *     @type string        $after           Text after the link text. Default empty.
+ *     @type string        $link_before     Text before the link. Default empty.
+ *     @type string        $link_after      Text after the link. Default empty.
+ *     @type bool          $echo            Whether to echo the menu or return it. Default true.
+ *     @type int           $depth           How many levels of the hierarchy are to be included. 0 means all. Default 0.
+ *     @type string        $walker          Allows a custom walker class to be specified. Default empty.
+ *     @type string        $theme_location  Theme location to be used. Must be registered with register_nav_menu()
+ *                                          in order to be selectable by the user.
+ *     @type string        $items_wrap      How the list items should be wrapped. Default is a ul with an id and class.
+ *                                          Uses printf() format with numbered placeholders.
+ * }
+ * @return mixed Menu output if $echo is true, false if there are no items or no menu was found.
  */
 function wp_nav_menu( $args = array() ) {
 	static $menu_id_slugs = array();