message: Use .expect() instead of .unwrap() when forming rust-lang URL.
diff: @@ -78,10 +78,11 @@ impl RustLangRedirector {
  impl iron::Handler for RustLangRedirector {
  fn handle(&self, _req: &mut Request) -> IronResult<Response> {
  let url = url::Url::parse("https://doc.rust-lang.org/stable/")
  - .unwrap()
  + .expect("failed to parse rust-lang.org base URL")
  .join(self.target)
  - .unwrap();
  - let url = Url::from_generic_url(url).unwrap();
  + .expect("failed to append crate name to rust-lang.org base URL");
  + let url = Url::from_generic_url(url)
  + .expect("failed to convert url::Url to iron::Url");
  Ok(Response::with((status::Found, Redirect(url))))
  }
  }
  