message: Address comments; inline closure.
diff: @@ -281,8 +281,10 @@ impl BlockAccumulator {
  // Prune the timestamps, so the count reflects only the most recently added acceptors.
  let purge_interval = self.purge_interval;
  - let is_expired = |(_, timestamp): &(_, Timestamp)| timestamp.elapsed() > purge_interval;
  - while block_timestamps.front().map_or(false, is_expired) {
  + while block_timestamps
  + .front()
  + .map_or(false, |(_, timestamp)| timestamp.elapsed() > purge_interval)
  + {
  block_timestamps.pop_front();
  }
  