tumble/layouts/partials/tags.html

<ul class="tags">
  {{ range .Params.tags }}
  <li><a href="{{ relURL "/tags/" }}{{ . | urlize }}/">{{ . }}</a></li>
  {{ end }}
  {{- with .Params.via -}}
  <li><a href="{{ . }}">/via</a></li>
  {{- end -}}
  <li><a href="{{ .Permalink }}" title="Permalink">#</a></li>
</ul>