Used the fileHeader constant

Author: mjonss

generate_perror/main.go

@@ -39,7 +39,10 @@ const (
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// Generated by generate_perror/main.go
 package main
+
+var MysqlErrNameToNum = map[string]int{
 `
 )
 
@@ -153,24 +156,7 @@ func main() {
 	}
 	defer f.Close()
 	w := bufio.NewWriter(f)
-	_, err = w.WriteString(`// Copyright 2023 PingCAP, Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Generated by generate_perror/main.go
-package main
-
-var MysqlErrNameToNum = map[string]int{
-`)
+	_, err = w.WriteString(fileHeader)
 
 	if err != nil {
 		log.Fatal(err)