diff --git a/wp-includes/class-wp-session-tokens.php b/wp-includes/class-wp-session-tokens.php
index 2f498b84b8..1e381addf8 100644
--- a/wp-includes/class-wp-session-tokens.php
+++ b/wp-includes/class-wp-session-tokens.php
@@ -237,6 +237,7 @@ abstract class WP_Session_Tokens {
 	 * @static
 	 */
 	final public static function destroy_all_for_all_users() {
+		/** This filter is documented in wp-includes/class-wp-session-tokens.php */
 		$manager = apply_filters( 'session_token_manager', 'WP_User_Meta_Session_Tokens' );
 		call_user_func( array( $manager, 'drop_sessions' ) );
 	}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 9df15578e0..264e2eadcf 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-39669';
+$wp_version = '4.8-alpha-39670';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.