Latte\Runtime\Filters::escapeCss PHP Method

    public static function escapeCss($s)
    {
        // http://www.w3.org/TR/2006/WD-CSS21-20060411/syndata.html#q6
        return addcslashes($s, "..!\"#\$%&'()*+,./:;<=>?@[\\]^`{|}~");
    }