message: reduce hover
diff: @@ -62,7 +62,7 @@ impl Session {
  let mut delay = delay_for(duration);
  loop {
  - if delay.is_elapsed() {
  + delay.await;
  let heartbeat_result = send_heartbeat(&target, &client, &tail_id).await;
  if heartbeat_result.is_err() {
  return heartbeat_result;
  @@ -70,7 +70,6 @@ impl Session {
  delay = delay_for(duration);
  }
  }
  - }
  Err(e) => {
  tx.send(()).unwrap();
  failure::bail!(http::format_error(e, Some(&tail_help)))
  