message: timestamp -> now
  (in arguments to Highway::on_new_vote highway_testing.rs)
diff: @@ -126,7 +126,7 @@ impl<C: Context> ActiveValidator<C> {
  pub(crate) fn on_new_vote(
  &mut self,
  vhash: &C::Hash,
  - timestamp: Timestamp,
  + now: Timestamp,
  state: &State<C>,
  instance_id: C::InstanceId,
  rng: &mut dyn CryptoRngCore,
  @@ -134,11 +134,10 @@ impl<C: Context> ActiveValidator<C> {
  if let Some(evidence) = state.opt_evidence(self.vidx) {
  return vec![Effect::WeEquivocated(evidence.clone())];
  }
  - if self.should_send_confirmation(vhash, timestamp, state) {
  + if self.should_send_confirmation(vhash, now, state) {
  let panorama = self.confirmation_panorama(vhash, state);
  if panorama.has_correct() {
  - let confirmation_vote =
  - self.new_vote(panorama, timestamp, None, state, instance_id, rng);
  + let confirmation_vote = self.new_vote(panorama, now, None, state, instance_id, rng);
  let vv = ValidVertex(Vertex::Vote(confirmation_vote));
  return vec![Effect::NewVertex(vv)];
  }
  