ref: b84389c5e0e1ef15449b24d488bbbcbc41245c59
dir: /tpl/tplimpl/embedded/templates/shortcodes/gist.html/
<script src="//gist.github.com/{{ index .Params 0 }}/{{ index .Params 1 }}.js{{if len .Params | eq 3 }}?file={{ index .Params 2 }}{{end}}"></script>