message: Address comments and fix format
diff: @@ -869,8 +869,8 @@ impl Connection {
  .largest_acknowledged(PNSpace::from(hdr.epoch));
  if (self.state == State::Handshaking) && (hdr.epoch == 3) {
  // Server has keys for epoch 3 but it is still in state Handshaking -> discharge packet.
  - assert_eq!(self.role(), Role::Server);
  - return None
  + debug_assert_eq!(self.role(), Role::Server);
  + return None;
  }
  match self.crypto.obtain_crypto_state(self.role, hdr.epoch) {
  Ok(cs) => match cs.rx.as_ref() {
  @@ -2886,7 +2886,7 @@ mod tests {
  // Now stream data gets before client_fin
  let server_out = server.process(client_stream_data.dgram(), now());
  - assert!(server_out.as_dgram_ref().is_none()); // the packet will be discharged...
  + assert!(server_out.as_dgram_ref().is_none()); // the packet will be discarded
  assert_eq!(*server.state(), State::Handshaking);
  let server_out = server.process(client_fin.dgram(), now());
  