-function get_wp_title_rss( $sep = '»' ) {
- $title = wp_title( $sep, false );
-
- if ( is_wp_error( $title ) ) {
- return $title->get_error_message();
- }
-
- if ( $title && $sep && ' ' !== substr( $title, 0, 1 ) ) {
- $title = " $sep " . $title;
+function get_wp_title_rss( $deprecated = '–' ) {
+ if ( '–' !== $deprecated ) {
+ /* translators: %s: 'document_title_separator' filter name */
+ _deprecated_argument( __FUNCTION__, '4.4.0', sprintf( __( 'Use the %s filter instead.' ), '<code>document_title_separator</code>' ) );