tml_filter_logout_url()

function tml_filter_logout_url( $url, $redirect ) {

    // Bail if logout action doesn't exist for some reason
    if ( ! tml_action_exists( 'logout' ) ) {
        return $url;
    }

    // Get the logout URL
    $url = tml_get_action_url( 'logout' );

    // Add the redirect query argument if needed
    if ( ! empty( $redirect ) ) {
        $url = add_query_arg( 'redirect_to', urlencode( $redirect ), $url ); // phpcs:ignore WordPress.PHP.DiscouragedPHPFunctions.urlencode_urlencode -- matches wp_logout_url()'s own encoding of the redirect_to arg.
    }

    // Add the nonce
    $url = wp_nonce_url( $url, 'log-out' );

    return $url;
}

View src/includes/functions.php, line 509 on GitHub