Updating to Sass 3.4 will occur bug

[azusa-tomita]

When decoding, string was broken

http://sassmeister.com/gist/ec13ad209f9cc03d0b94

it seems to be solved by changing to \\r and \\n

    $string: _strip-token($string, "\r", $cr);
    $string: _strip-token($string, "\n", $cr);