message: docs(client): Update `Client::configure` example to compile
diff: @@ -49,11 +49,17 @@ impl Client<HttpConnector> {
  ///
  /// # Example
  ///
  - /// ```dont_run
  - /// # use hyper::Client;
  - /// let client = Client::configure()
  + /// ```no_run
  + /// extern crate hyper;
  + /// extern crate tokio_core;
  + ///
  + /// fn main() {
  + /// let mut core = tokio_core::reactor::Core::new().unwrap();
  + /// let handle = core.handle();
  + /// let client = hyper::Client::configure()
  /// .keep_alive(true)
  - /// .build().unwrap();
  + /// .build(&handle);
  + /// }
  /// ```
  #[inline]
  pub fn configure() -> Config<UseDefaultConnector> {
  