ref: 28143397d625cce1f89f4161cba97c0dddd9004c
dir: /tpl/tplimpl/embedded/templates/shortcodes/gist.html/
<script type="application/javascript" src="https://gist.github.com/{{ index .Params 0 }}/{{ index .Params 1 }}.js{{if len .Params | eq 3 }}?file={{ index .Params 2 }}{{end}}"></script>