Merge pull request #35 from wangjingcun/master

chore: remove redundant words in comment

cmd/devp2p/nodesetcmd.go

@@ -181,7 +181,7 @@ func parseFilterLimit(args []string) (int, error) {
 	return limit, nil
 }
 
-// andFilter parses node filters in args and and returns a single filter that requires all
+// andFilter parses node filters in args and returns a single filter that requires all
 // of them to match.
 func andFilter(args []string) (nodeFilter, error) {
 	checks, err := parseFilters(args)

consensus/istanbul/backend/snapshot_test.go

@@ -226,7 +226,7 @@ func TestVoting(t *testing.T) {
 			},
 			results: []string{"A", "B"},
 		}, {
-			// Cascading changes are not allowed, only the the account being voted on may change
+			// Cascading changes are not allowed, only the account being voted on may change
 			validators: []string{"A", "B", "C", "D"},
 			votes: []testerVote{
 				{validator: "A", voted: "C", auth: false},

signer/core/signed_data.go

@@ -275,7 +275,7 @@ func (api *SignerAPI) EcRecover(ctx context.Context, data hexutil.Bytes, sig hex
 	// addr = ecrecover(hash, signature)
 	//
 	// Note, the signature must conform to the secp256k1 curve R, S and V values, where
-	// the V value must be be 27 or 28 for legacy reasons.
+	// the V value must be 27 or 28 for legacy reasons.
 	//
 	// https://github.com/electroneum/electroneum-sc/wiki/Management-APIs#personal_ecRecover
 	if len(sig) != 65 {