message: new clippy fixups for recently merged code
diff: @@ -2095,7 +2095,7 @@ mod tests {
  hconn.process(out.dgram(), now());
  // Read first frame
  - match hconn.events().into_iter().skip(1).next().unwrap() {
  + match hconn.events().into_iter().nth(1).unwrap() {
  Http3Event::DataReadable { stream_id } => {
  assert_eq!(stream_id, request_stream_id);
  let mut buf = [0u8; 100];
  @@ -2116,16 +2116,10 @@ mod tests {
  Http3Event::DataReadable { stream_id } => {
  assert_eq!(stream_id, request_stream_id);
  let mut buf = [0u8; 100];
  - match hconn.read_data(now(), stream_id, &mut buf) {
  - Err(_e) => {
  - assert!(false);
  - }
  - Ok((len, fin)) => {
  + let (len, fin) = hconn.read_data(now(), stream_id, &mut buf).unwrap();
  assert_eq!(&buf[..len], &[0x64, 0x65, 0x66]);
  assert_eq!(fin, true);
  }
  - }
  - }
  x => {
  eprintln!("event {:?}", x);
  panic!()
  