Ticket #41743: 41743.patch

wp-includes/widgets.php

@@ -1037 +1037 @@
         global $wp_widget_factory;
 
         if ( ! isset( $wp_widget_factory->widgets[ $widget ] ) ) {
-                _doing_it_wrong( __FUNCTION__, __( 'Widgets need to be registered before they can be displayed.' ), '4.9.0' );
+                /* translators: %s: register_widget() */
+                _doing_it_wrong( __FUNCTION__, sprintf( __( 'Widgets need to be registered using %s, before they can be displayed.' ), '<code>register_widget()</code>' ), '4.9.0' );
                 return;
         }