tidy_parser.php
private function dequote($quoted)
    {
        if (preg_match('/^(\'([^\']*)\'|"([^"]*)")$/', $quoted, $matches)) {
            return isset($matches[3]) ? $matches[3] : $matches[2];
        }

        return $quoted;
    }
private function dequote($quoted)
    {
        if (preg_match('/^(\'([^\']*)\'|"([^"]*)")$/', $quoted, $matches)) {
            return isset($matches[3]) ? $matches[3] : $matches[2];
        }

        return $quoted;
    }
Remove start and end quotes.

@param string $quoted    A quoted string.

@return string           Quotes are gone.