Upgrader: Rename class-wp-automatic-upgrader.php to class-wp-automatic-updater.php.

The class is named `WP_Automatic_Updater` not `WP_Automatic_Upgrader` like all the other upgrader classes. 

Introduced in [37409].

Merge of [38242] to the 4.6 branch.

Props DrewAPicture for review.
Fixes #37628.
Built from https://develop.svn.wordpress.org/branches/4.6@38243


git-svn-id: http://core.svn.wordpress.org/branches/4.6@38184 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/class-wp-upgrader.php

@@ -903,5 +903,5 @@ require_once ABSPATH . 'wp-admin/includes/class-core-upgrader.php';
 /** File_Upload_Upgrader class */
 require_once ABSPATH . 'wp-admin/includes/class-file-upload-upgrader.php';
 
-/** WP_Automatic_Upgrader class */
-require_once ABSPATH . 'wp-admin/includes/class-wp-automatic-upgrader.php';
+/** WP_Automatic_Updater class */
+require_once ABSPATH . 'wp-admin/includes/class-wp-automatic-updater.php';

wp-admin/includes/update-core.php

@@ -703,6 +703,8 @@ $_old_files = array(
 'wp-includes/js/tinymce/plugins/wpfullscreen',
 // 4.5
 'wp-includes/theme-compat/comments-popup.php',
+// 4.6
+'wp-admin/includes/class-wp-automatic-upgrader.php', // Wrong file name, see #37628.
 );
 
 /**

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.6-RC1-38241';
+$wp_version = '4.6-RC1-38243';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.