Well Format the changed file

.gitignore

@@ -1,2 +1,3 @@
 documents
 _book
+.idea/workspace.xml

main.go

@@ -105,20 +105,19 @@ func (s *DB) New() *DB {
 // DataSource returns its opened dataSource:
 //    gorm.Open("postgres", "host=localhost user=root dbname=test sslmode=disable password=123")
 // Then dataSource = "host=localhost user=root dbname=test sslmode=disable password=123"
-func (s *DB) DataSource() string{
+func (s *DB) DataSource() string {
 	return s.dataSource
 }
 
 // CopyDB returns its origin db engine whose driver is github.com/lib/pq
-func (s *DB) CopyDB() (*sql.DB,error){
-	if s.copyDB!=nil {
-		return s.copyDB,nil
-	}else{
+func (s *DB) CopyDB() (*sql.DB, error) {
+	if s.copyDB != nil {
+		return s.copyDB, nil
+	} else {
 		return sql.Open(s.Dialect().GetName(), s.DataSource())
 	}
 }
 
-
 type closer interface {
 	Close() error
 }
@@ -501,13 +500,13 @@ func (s *DB) Exec(sql string, values ...interface{}) *DB {
 //     db.CopyIn(false, "user", args, "name","age")
 // This stands for 'insert into user(name,age) values('tom', 9),('sara',10),('jim',19)'
 // 				or 'COPY 'user' ('name','age') FROM STDIN`'
-func (s *DB) CopyIn(closeAfterUsed bool,table string, args [][]interface{}, columns ...string) error {
+func (s *DB) CopyIn(closeAfterUsed bool, table string, args [][]interface{}, columns ...string) error {
 	if s.Dialect().GetName() != "postgres" {
 		return errors.New("CopyIn only supports postgres")
 	}
 
 	pdb, err := s.CopyDB()
-	if closeAfterUsed{
+	if closeAfterUsed {
 		defer pdb.Close()
 	}
 
@@ -523,7 +522,7 @@ func (s *DB) CopyIn(closeAfterUsed bool,table string, args [][]interface{}, colu
 	if err != nil {
 		return err
 	}
-	for _,v:= range args {
+	for _, v := range args {
 		_, err = stmt.Exec(v...)
 		if err != nil {
 			txn.Rollback()

main_test.go

@@ -1080,22 +1080,21 @@ func TestDB_CopyIn(t *testing.T) {
 	if e != nil {
 		t.Fatal(e.Error())
 	}
-	type Example struct{
+	type Example struct {
 		Name string
 		Age  int
 	}
-	var examples = make([]Example,0)
-	e=DB.Raw("select * from example").Find(&examples).Error
-	if e!=nil {
+	var examples = make([]Example, 0)
+	e = DB.Raw("select * from example").Find(&examples).Error
+	if e != nil {
 		t.Fatal(e.Error())
 	}
-	if len(examples) ==0 {
+	if len(examples) == 0 {
 		t.Fatal("examples length wants more than 3, but got 0")
 	}
 	fmt.Println(examples)
 }
 
-
 func BenchmarkGorm(b *testing.B) {
 	b.N = 2000
 	for x := 0; x < b.N; x++ {