是\'_s\' 可在上找到的代码中的值Customizing with the filter, 只需参考text domain 作为文档或文字值？

/**
 * Filters wp_title to print a neat <title> tag based on what is being viewed.
 *
 * @param string $title Default title text for current view.
 * @param string $sep Optional separator.
 * @return string The filtered title.
 */
function theme_name_wp_title( $title, $sep ) {
    if ( is_feed() ) {
        return $title;
    }

    global $page, $paged;

    // Add the blog name
    $title .= get_bloginfo( \'name\', \'display\' );

    // Add the blog description for the home/front page.
    $site_description = get_bloginfo( \'description\', \'display\' );
    if ( $site_description && ( is_home() || is_front_page() ) ) {
        $title .= " $sep $site_description";
    }

    // Add a page number if necessary:
    if ( ( $paged >= 2 || $page >= 2 ) && ! is_404() ) {
        $title .= " $sep " . sprintf( __( \'Page %s\', \'_s\' ), max( $paged, $page ) );
    }

    return $title;
}
add_filter( \'wp_title\', \'theme_name_wp_title\', 10, 2 );

只是为了验证，但如果它是该arg的一个文本值，您能解释一下该函数中该arg发生了什么吗？是在哪个文本域中转换的，还是什么？

$title .= " $sep " . sprintf( __( \'Page %s\', \'_s\' ), max( $paged, $page ) );

$title .= " $sep ";
$title .= sprintf( 
    __( \'Page %s\', \'_s\' ), 
    max( $paged, $page ) 
);