Reinstate heartbeat

Formatting

src/wp-admin/edit-form-blocks.php

@@ -123,6 +123,14 @@ static function ( $classes ) {
 	'before'
 );
 
+// Set Heartbeat interval to 10 seconds, used to refresh post locks.
+wp_add_inline_script(
+	'heartbeat',
+	'if ( window.wp && window.wp.heartbeat ) {
+		window.wp.heartbeat.interval( 10 );
+	}'
+);
+
 /*
  * Get all available templates for the post/page attributes meta-box.
  * The "Default template" array element should only be added if the array is

src/wp-includes/rest-api/endpoints/class-wp-rest-global-styles-controller.php

@@ -531,7 +531,7 @@ public function get_theme_item_permissions_check( $request ) {
 
 		return new WP_Error(
 			'rest_cannot_read_global_styles',
-			__( 'Sorry, you are not allowed to access the global styles on this site.', 'gutenberg' ),
+			__( 'Sorry, you are not allowed to access the global styles on this site.' ),
 			array(
 				'status' => rest_authorization_required_code(),
 			)
@@ -626,7 +626,7 @@ public function get_theme_items( $request ) {
 			);
 		}
 
-		$response   = array();
+		$response = array();
 
 		// Register theme-defined variations e.g. from block style variation partials under `/styles`.
 		$partials = WP_Theme_JSON_Resolver::get_style_variations( 'block' );