github.com/SDLMoe/hugo@v0.47.1/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>