Fix comment

internal/consensus/state.go

@@ -1325,7 +1325,7 @@ func (cs *State) proposalIsTimely() bool {
 func (cs *State) defaultDoPrevote(height int64, round int32) {
 	logger := cs.Logger.With("height", height, "round", round)
 
-	// We did not receive a proposal within this round. (and thus executing this from a timeout)
+	// Check that a proposed block was not received within this round (and thus executing this from a timeout).
 	if cs.ProposalBlock == nil {
 		logger.Debug("prevote step: ProposalBlock is nil; prevoting nil")
 		cs.signAddVote(tmproto.PrevoteType, nil, types.PartSetHeader{})