i test code found it, i am not sure it is a bug or it is designned; but it is weird;

When Push to the notify channel ,received shutdown sign.we know it is pick one of two,but actually run which one,God knows.

follow the code ,https://github.com/hashicorp/raft/blob/main/raft.go#L434

notify := r.config().NotifyCh

	// Push to the notify channel if given
	if notify != nil {
		select {
		case notify <- true:
		case <-r.shutdownCh:
		}
	}