gofmt fix for `No newline at end of file` (#2973)

This fix fixes the `\ No newline at end of file`
in plugin/chaos/zowners.go, by adding `"\n"`
to the end of owners_generate.go.

Also fixes a gofmt issue in plugin/etcd/setup.go
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

owners_generate.go

@@ -58,6 +58,8 @@ var Owners = []string{`
 		}
 		golist += fmt.Sprintf("%q%s", a, c)
 	}
+	// to prevent `No newline at end of file` with gofmt
+	golist += "\n"
 
 	if err := ioutil.WriteFile("plugin/chaos/zowners.go", []byte(golist), 0644); err != nil {
 		log.Fatal(err)

plugin/etcd/setup.go

@@ -9,8 +9,8 @@ import (
 	mwtls "github.com/coredns/coredns/plugin/pkg/tls"
 	"github.com/coredns/coredns/plugin/pkg/upstream"
 
-	etcdcv3 "github.com/coreos/etcd/clientv3"
 	"github.com/caddyserver/caddy"
+	etcdcv3 "github.com/coreos/etcd/clientv3"
 )
 
 var log = clog.NewWithPlugin("etcd")