Index: src/wp-admin/admin.php
===================================================================
--- src/wp-admin/admin.php	(revision 41967)
+++ src/wp-admin/admin.php	(working copy)
@@ -87,6 +87,11 @@
 if ( ! wp_next_scheduled( 'wp_scheduled_delete' ) && ! wp_installing() )
 	wp_schedule_event(time(), 'daily', 'wp_scheduled_delete');
 
+// Schedule Transient cleanup.
+if ( ! wp_next_scheduled( 'delete_expired_transients' ) && ! wp_installing() ) {
+	wp_schedule_event( time(), 'daily', 'delete_expired_transients' );
+}
+
 set_screen_options();
 
 $date_format = __( 'F j, Y' );
@@ -94,9 +99,6 @@
 
 wp_enqueue_script( 'common' );
 
-
-
-
 /**
  * $pagenow is set in vars.php
  * $wp_importers is sometimes set in wp-admin/includes/import.php
Index: src/wp-includes/option.php
===================================================================
--- src/wp-includes/option.php	(revision 41967)
+++ src/wp-includes/option.php	(working copy)
@@ -820,13 +820,13 @@
  * Deletes all expired transients.
  *
  * The multi-table delete syntax is used to delete the transient record
- * from table a, and the corresponding transient_timeout record from table b.                           +
+ * from table a, and the corresponding transient_timeout record from table b.
  *
  * @since 4.9.0
  *
  * @param bool $force_db Optional. Force cleanup to run against the database even when an external object cache is used.
  */
-function delete_expired_transients( $force_db = false) {
+function delete_expired_transients( $force_db = false ) {
 	global $wpdb;
 
 	if ( ! $force_db && wp_using_ext_object_cache() ) {