Latte\Runtime\Filters::spacelessHtml PHP Method

    public static function spacelessHtml($s, $phase = NULL, &$strip = TRUE)
    {
        if ($phase & PHP_OUTPUT_HANDLER_START) {
            $s = ltrim($s);
        }
        if ($phase & PHP_OUTPUT_HANDLER_FINAL) {
            $s = rtrim($s);
        }
        return preg_replace_callback('#[ \\t\\r\\n]+|<(/)?(textarea|pre|script)(?=\\W)#si', function ($m) use(&$strip) {
            if (empty($m[2])) {
                return $strip ? ' ' : $m[0];
            } else {
                $strip = !empty($m[1]);
                return $m[0];
            }
        }, $s);
    }