Docs: Correct DocBlock descriptions for the $before, $after, $link_before, and $link_after arguments for wp_nav_menu().

* `$before` falls before the link markup starts
* `$after` falls after the link markup ends
* `$link_before` falls before the link text
* `$link_after` falls after the link text

Props wp_smith for the initial patch.

See #32246.


git-svn-id: https://develop.svn.wordpress.org/trunk@37561 602fd350-edb4-49c9-b593-d223f7449a82

Author: DrewAPicture

src/wp-includes/nav-menu-template.php

@@ -235,10 +235,10 @@ public function end_el( &$output, $item, $depth = 0, $args = array() ) {
  *     @type string        $container_id    The ID that is applied to the container. Default empty.
  *     @type callable|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 string        $before          Text before the link markup. Default empty.
+ *     @type string        $after           Text after the link markup. Default empty.
+ *     @type string        $link_before     Text before the link text. Default empty.
+ *     @type string        $link_after      Text after the link text. 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 object        $walker          Instance of a custom walker class. Default empty.