Docs: Add a version and standardize the file header summary for wp-admin/includes/admin.php.

See #33701.

Built from https://develop.svn.wordpress.org/trunk@35166


git-svn-id: http://core.svn.wordpress.org/trunk@35132 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/admin.php

@@ -1,9 +1,10 @@
 <?php
 /**
- * Includes all of the WordPress Administration API files.
+ * Core Administration API
  *
  * @package WordPress
  * @subpackage Administration
+ * @since 2.3.0
  */
 
 if ( ! defined('WP_ADMIN') ) {

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-35165';
+$wp_version = '4.4-alpha-35166';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.