Ticket #18548: 18548-_doing_it_wrong.patch

src/wp-includes/theme.php

@@ -1615 +1615 @@
                 case 'title-tag' :
                         // Can be called in functions.php but must happen before wp_loaded, i.e. not in header.php.
                         if ( did_action( 'wp_loaded' ) ) {
-                                _doing_it_wrong( "add_theme_support( 'title-tag' )", sprintf( _x( 'You need to add theme support before %s.', 'action name' ), '<code>wp_loaded</code>' ), '4.1.0' );
+                                /* translators: 1: Theme support 2: hook name */
+                                _doing_it_wrong( "add_theme_support( 'title-tag' )", sprintf( __( 'Theme support for %1$s should be registered before the %2$s hook.' ),
+                                        '<code>title-tag</code>', '<code>wp_loaded</code>' ), '4.1' );
 
                                 return false;
                         }