dns/dnsmessage: use exported MustNewName in example

Change-Id: I517c4cf7c683b26fd80d069cbc2415e5c04339e6
GitHub-Last-Rev: 9437c15
GitHub-Pull-Request: #145
Reviewed-on: https://go-review.googlesource.com/c/net/+/425017
Reviewed-by: Damien Neil <dneil@google.com>
Run-TryBot: Damien Neil <dneil@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>

Author: mateusz834

dns/dnsmessage/example_test.go

@@ -12,41 +12,33 @@ import (
 	"golang.org/x/net/dns/dnsmessage"
 )
 
-func mustNewName(name string) dnsmessage.Name {
-	n, err := dnsmessage.NewName(name)
-	if err != nil {
-		panic(err)
-	}
-	return n
-}
-
 func ExampleParser() {
 	msg := dnsmessage.Message{
 		Header: dnsmessage.Header{Response: true, Authoritative: true},
 		Questions: []dnsmessage.Question{
 			{
-				Name:  mustNewName("foo.bar.example.com."),
+				Name:  dnsmessage.MustNewName("foo.bar.example.com."),
 				Type:  dnsmessage.TypeA,
 				Class: dnsmessage.ClassINET,
 			},
 			{
-				Name:  mustNewName("bar.example.com."),
+				Name:  dnsmessage.MustNewName("bar.example.com."),
 				Type:  dnsmessage.TypeA,
 				Class: dnsmessage.ClassINET,
 			},
 		},
 		Answers: []dnsmessage.Resource{
 			{
 				Header: dnsmessage.ResourceHeader{
-					Name:  mustNewName("foo.bar.example.com."),
+					Name:  dnsmessage.MustNewName("foo.bar.example.com."),
 					Type:  dnsmessage.TypeA,
 					Class: dnsmessage.ClassINET,
 				},
 				Body: &dnsmessage.AResource{A: [4]byte{127, 0, 0, 1}},
 			},
 			{
 				Header: dnsmessage.ResourceHeader{
-					Name:  mustNewName("bar.example.com."),
+					Name:  dnsmessage.MustNewName("bar.example.com."),
 					Type:  dnsmessage.TypeA,
 					Class: dnsmessage.ClassINET,
 				},