Docs: Add a missing return notation and to the DocBlock for `WP_Session_Tokens::get_instance()`.

Also adds an inline reference to the `session_token_manager` hook in the description.

Props Shelob9 for the initial patch.
Fixes #40102.

Built from https://develop.svn.wordpress.org/trunk@40998


git-svn-id: http://core.svn.wordpress.org/trunk@40848 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-session-tokens.php

@@ -35,16 +35,17 @@ abstract class WP_Session_Tokens {
 	}
 
 	/**
-	 * Get a session token manager instance for a user.
+	 * Retrieves a session token manager instance for a user.
 	 *
-	 * This method contains a filter that allows a plugin to swap out
-	 * the session manager for a subclass of WP_Session_Tokens.
+	 * This method contains a {@see 'session_token_manager'} filter, allowing a plugin to swap out
+	 * the session manager for a subclass of `WP_Session_Tokens`.
 	 *
 	 * @since 4.0.0
 	 * @access public
 	 * @static
 	 *
 	 * @param int $user_id User whose session to manage.
+	 * @return WP_User_Meta_Session_Tokens WP_User_Meta_Session_Tokens class instance by default.
 	 */
 	final public static function get_instance( $user_id ) {
 		/**

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-40997';
+$wp_version = '4.9-alpha-40998';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.