添加golang 1.13 error 相关

hero · hero · commit a9c7d08a1930 · 2019-09-12T09:29:07.000+08:00
diff --git a/err/main.go b/err/main.go
@@ -15,8 +15,8 @@ type MyError struct {
 func (m MyError) Error() string {
 	return fmt.Sprintf("%v %v %v", m.Name, m.Time, m.Err)
 }
-func (e *MyError) Unwrap() error {
-	return e.Err
+func (m MyError) Unwrap() error {
+	return m.Err
 }
 
 func TestErr() error {

Original file line number	Diff line number	Diff line change
`@@ -15,8 +15,8 @@ type MyError struct {`
`15`	`15`	`func (m MyError) Error() string {`
`16`	`16`	`return fmt.Sprintf("%v %v %v", m.Name, m.Time, m.Err)`
`17`	`17`	`}`
`18`		`-func (e *MyError) Unwrap() error {`
`19`		`- return e.Err`
	`18`	`+func (m MyError) Unwrap() error {`
	`19`	`+ return m.Err`
`20`	`20`	`}`
`21`	`21`
`22`	`22`	`func TestErr() error {`