leading space that is UTF-8 does change")
      request(
        "text/plain;charset=utf-8 ;x=x",
        "text/plain;charset=utf-8 ;x=x",
        "charset with trailing space that is UTF-8 does not change");
      request(
        "text/plain;charset=\"utf-8\"",
        "text/plain;charset=\"utf-8\"",
        "charset in double quotes that is UTF-8 does not change")
      request(
        "text/plain;charset=\" utf-8\"",
        "text/plain;charset=UTF-8",
        "charset in double quotes with space")
   