modify the output when the output-dir is specified

Avoid output in IO when output-dir is specified.

Signed-off-by: Zhou Hao <zhouhao@cn.fujitsu.com>

cmd/helm/template.go

@@ -148,7 +148,7 @@ func newTemplateCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
 					for _, m := range manifestsToRender {
 						fmt.Fprintf(out, "---\n%s\n", m)
 					}
-				} else {
+				} else if client.OutputDir == "" {
 					fmt.Fprintf(out, "%s", manifests.String())
 				}
 			}