Fix kubectl get -f <file> -o <nondefault printer>

Fix kubectl get -f <file> -o <nondefault printer> so it prints all the
objects in the file, instead of just the first one. Also add a test for
this feature.

pkg/kubectl/cmd/annotate.go

@@ -197,14 +197,14 @@ func (o AnnotateOptions) RunAnnotate(f cmdutil.Factory, cmd *cobra.Command) erro
 		return err
 	}
 
-	var singularResource bool
-	r.IntoSingular(&singularResource)
+	var singleItemImpliedResource bool
+	r.IntoSingleItemImplied(&singleItemImpliedResource)
 
 	// only apply resource version locking on a single resource.
 	// we must perform this check after o.builder.Do() as
 	// []o.resources can not not accurately return the proper number
 	// of resources when they are not passed in "resource/name" format.
-	if !singularResource && len(o.resourceVersion) > 0 {
+	if !singleItemImpliedResource && len(o.resourceVersion) > 0 {
 		return fmt.Errorf("--resource-version may only be used with a single resource")
 	}