message: Improve formatting for matches macro.
  Also remove a TODO, because that was fixed, by setting appropriate need_processing flag
diff: @@ -247,13 +247,9 @@ impl WtTest {
  wt_session_id: StreamId,
  stream_type: StreamType,
  ) -> StreamId {
  - let wt_stream_id = self
  - .client
  + self.client
  .webtransport_create_stream(wt_session_id, stream_type)
  - .unwrap();
  - // TODO investigate why this is needed.
  - self.exchange_packets();
  - wt_stream_id
  + .unwrap()
  }
  fn send_data_client(&mut self, wt_stream_id: StreamId, data: &[u8]) {
  @@ -331,7 +327,15 @@ impl WtTest {
  }
  fn receive_stop_sending_client(&mut self, expected_stream_id: StreamId) {
  - let wt_stop_sending_event = |e| matches!(e, Http3ClientEvent::StopSending { stream_id, error } if stream_id == expected_stream_id && error == Error::HttpNoError.code());
  + let wt_stop_sending_event = |e| {
  + matches!(
  + e,
  + Http3ClientEvent::StopSending {
  + stream_id,
  + error
  + } if stream_id == expected_stream_id && error == Error::HttpNoError.code()
  + )
  + };
  assert!(self.client.events().any(wt_stop_sending_event));
  }
  @@ -407,14 +411,22 @@ impl WtTest {
  }
  fn receive_reset_server(&mut self, expected_stream_id: StreamId) {
  - assert!(
  - matches!(self.server.next_event().unwrap(), Http3ServerEvent::StreamReset { stream, error } if stream.stream_id() == expected_stream_id && error == Error::HttpNoError.code())
  - );
  + assert!(matches!(
  + self.server.next_event().unwrap(),
  + Http3ServerEvent::StreamReset {
  + stream,
  + error
  + } if stream.stream_id() == expected_stream_id && error == Error::HttpNoError.code()
  + ));
  }
  fn receive_stop_sending_server(&mut self, expected_stream_id: StreamId) {
  - assert!(
  - matches!(self.server.next_event().unwrap(), Http3ServerEvent::StreamStopSending { stream, error } if stream.stream_id() == expected_stream_id && error == Error::HttpNoError.code())
  - );
  + assert!(matches!(
  + self.server.next_event().unwrap(),
  + Http3ServerEvent::StreamStopSending {
  + stream,
  + error
  + } if stream.stream_id() == expected_stream_id && error == Error::HttpNoError.code()
  + ));
  }
  }
  