I want to conditionally prefix the contents of the tag if the IP address matches the dev server. I cobbled something together, and it will output the title tag correctly, but the original title tag precedes it, and therefore is the content shown in the browser tab. Thoughts?

$host = $_SERVER['SERVER_ADDR'];
if ($host =='0.0.0.0') {
    remove_action( 'wp_head', '_wp_render_title_tag', 1 );
    add_action( 'wp_head', '_wp_render_title_tag_dev', 1 );

        function _wp_render_title_tag_dev() {
            if ( did_action( 'wp_head' ) || doing_action( 'wp_head' ) ) {     
                echo '<title>DEV SRV:' . wp_get_document_title() . '</title>' . "n";
            }
        }
}