chore: fix some comments (#2581)

Signed-off-by: stellrust <gohunter@foxmail.com>

cmd/faucet/faucet.go

@@ -642,7 +642,7 @@ func (f *faucet) loop() {
 			f.lock.RUnlock()
 		}
 	}()
-	// Wait for various events and assing to the appropriate background threads
+	// Wait for various events and assign to the appropriate background threads
 	for {
 		select {
 		case head := <-heads:

cmd/utils/history_test.go

@@ -83,7 +83,7 @@ func TestHistoryImportAndExport(t *testing.T) {
 		t.Fatalf("unable to initialize chain: %v", err)
 	}
 	if _, err := chain.InsertChain(blocks); err != nil {
-		t.Fatalf("error insterting chain: %v", err)
+		t.Fatalf("error inserting chain: %v", err)
 	}
 
 	// Make temp directory for era files.

signer/fourbyte/abi.go

@@ -98,7 +98,7 @@ func parseCallData(calldata []byte, unescapedAbidata string) (*decodedCallData,
 	if len(argdata)%32 != 0 {
 		return nil, fmt.Errorf("invalid call data; length should be a multiple of 32 bytes (was %d)", len(argdata))
 	}
-	// Validate the called method and upack the call data accordingly
+	// Validate the called method and unpack the call data accordingly
 	abispec, err := abi.JSON(strings.NewReader(unescapedAbidata))
 	if err != nil {
 		return nil, fmt.Errorf("invalid method signature (%q): %v", unescapedAbidata, err)