ref: 1c7b7b4ef293aa133e5b55f3ebb2d37d8839532f
dir: /tpl/tplimpl/embedded/templates/shortcodes/gist.html/
<script type="application/javascript" src="//gist.github.com/{{ index .Params 0 }}/{{ index .Params 1 }}.js{{if len .Params | eq 3 }}?file={{ index .Params 2 }}{{end}}"></script>