How to Group different services that shares same tags

I would like to group consul service by tags, using the below:

{{range services}}
{{range $tag, $services := service .Name | byTag }}
{{if or (eq $tag “Volkswagen”) }}
{{ range $services }}
{{ $tag}}
{{ .Name }}
{{ end }}{{ end }}{{end}}{{end}}
Output:

  Volkswagen
   Golf

  Volkswagen
   BUW

I d like it to be:

Volkswagen is the tag:

  Volkswagen

  Golf
  BUW

consul-template v0.29.0 (34ada7a)

Thanks