public function versionDiff($current, $latest)
    {
        $needle = 0;

        while ($needle < strlen($current) && $needle < strlen($latest)) {
            if ($current[$needle] !== $latest[$needle]) {
                break;
            }

            $needle++;
        }

        return substr($latest, 0, $needle).'<green>'.substr($latest, $needle).'</green>';
    }