cmd/compile/internal/syntax: replace bytes.Compare call with bytes.Equal

Change-Id: I783e02e215efaebf4936146c6aaa032634fdfa64
GitHub-Last-Rev: 24680a7
GitHub-Pull-Request: #66304
Reviewed-on: https://go-review.googlesource.com/c/go/+/571595
Auto-Submit: Ian Lance Taylor <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>

Author: testwill

src/cmd/compile/internal/syntax/parser_test.go

@@ -186,7 +186,7 @@ func verifyPrint(t *testing.T, filename string, ast1 *File) {
 	}
 	bytes2 := buf2.Bytes()
 
-	if bytes.Compare(bytes1, bytes2) != 0 {
+	if !bytes.Equal(bytes1, bytes2) {
 		fmt.Printf("--- %s ---\n", filename)
 		fmt.Printf("%s\n", bytes1)
 		fmt.Println()