chore: fix some minor issues in comments

action/protocol/poll/slasher.go

@@ -89,7 +89,7 @@ func (sh *Slasher) CreatePreStates(ctx context.Context, sm protocol.StateManager
 	nextEpochStartHeight := rp.GetEpochHeight(epochNum + 1)
 	if featureCtx.UpdateBlockMeta {
 		if err := sh.updateCurrentBlockMeta(ctx, sm); err != nil {
-			return errors.Wrap(err, "faild to update current epoch meta")
+			return errors.Wrap(err, "failed to update current epoch meta")
 		}
 	}
 	if blkCtx.BlockHeight == epochLastHeight && featureWithHeightCtx.CalculateProbationList(nextEpochStartHeight) {

action/protocol/staking/protocol.go

@@ -414,7 +414,7 @@ func (p *Protocol) handleStakingIndexer(ctx context.Context, epochStartHeight ui
 	return p.candBucketsIndexer.PutCandidates(epochStartHeight, candidateList)
 }
 
-// PreCommit preforms pre-commit
+// PreCommit performs pre-commit
 func (p *Protocol) PreCommit(ctx context.Context, sm protocol.StateManager) error {
 	height, err := sm.Height()
 	if err != nil {

api/grpcserver_test.go

@@ -440,8 +440,8 @@ func TestGrpcServer_GetReceiptByAction(t *testing.T) {
 		require.Contains(err.Error(), expectedErr.Error())
 	})
 
-	t.Run("failed to get reciept by action hash", func(t *testing.T) {
-		expectedErr := errors.New("failed to get reciept by action hash")
+	t.Run("failed to get receipt by action hash", func(t *testing.T) {
+		expectedErr := errors.New("failed to get receipt by action hash")
 		core.EXPECT().ReceiptByActionHash(gomock.Any()).Return(receipt, expectedErr)
 
 		_, err := grpcSvr.GetReceiptByAction(context.Background(), &iotexapi.GetReceiptByActionRequest{})

api/web3server.go

@@ -301,7 +301,7 @@ func parseWeb3Reqs(reader io.Reader) (gjson.Result, error) {
 		return gjson.Result{}, errors.New("request json format is not valid")
 	}
 	ret := gjson.Parse(string(data))
-	// check rquired field
+	// check required field
 	for _, req := range ret.Array() {
 		id := req.Get("id")
 		method := req.Get("method")

db/batch/kv_cache_test.go

@@ -160,7 +160,7 @@ func BenchmarkMapKey_ValueOperate(b *testing.B) {
 			}
 		}
 	})
-	b.Run("orign map assign", func(b *testing.B) {
+	b.Run("origin map assign", func(b *testing.B) {
 		for i := 0; i < b.N; i++ {
 			for k := range keyTags2 {
 				keyTags2[k] = []int{0}

db/kvstorewithbuffer.go

@@ -176,12 +176,12 @@ func (kvb *kvStoreWithBuffer) Get(ns string, key []byte) ([]byte, error) {
 }
 
 func (kvb *kvStoreWithBuffer) Put(ns string, key, value []byte) error {
-	kvb.buffer.Put(ns, key, value, fmt.Sprintf("faild to put %x in %s", key, ns))
+	kvb.buffer.Put(ns, key, value, fmt.Sprintf("failed to put %x in %s", key, ns))
 	return nil
 }
 
 func (kvb *kvStoreWithBuffer) MustPut(ns string, key, value []byte) {
-	kvb.buffer.Put(ns, key, value, fmt.Sprintf("faild to put %x in %s", key, ns))
+	kvb.buffer.Put(ns, key, value, fmt.Sprintf("failed to put %x in %s", key, ns))
 }
 
 func (kvb *kvStoreWithBuffer) Delete(ns string, key []byte) error {