message: Improve Display for CongestionControl
diff: @@ -261,7 +261,11 @@ impl Default for CongestionControl {
  impl Display for CongestionControl {
  fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  - write!(f, "CongCtrl")
  + write!(
  + f,
  + "CongCtrl {}/{} ssthresh {}",
  + self.bytes_in_flight, self.congestion_window, self.ssthresh
  + )
  }
  }
  