themes/docsy/layouts/partials/print/toc-li.html

{{ $tpl := printf "print/toc-li-%s.html" .Page.Type }}
{{ if templates.Exists (printf "partials/%s" $tpl) }}
  {{ partial $tpl . }}
{{ else -}}
<li>{{ .sid}}: <a href="#pg-{{.Page.File.UniqueID}}">{{ .Page.Title }}</a></li>
{{ end }}