add anchor links for headlines

layouts/partials/content.html

@@ -0,0 +1,8 @@
+{{ $showAnchor := (and (default true .Page.Params.geekdocAnchor) (default true .Site.Params.geekdocAnchor)) }}
+
+{{ $.Scratch.Set "content" (.Content | replaceRE `<nav id="TableOfContents">\s*<ul>\s*<li>\s*<ul>` `<nav id="TableOfContents"><ul>` | replaceRE `</ul>\s*</li>\s*</ul>\s*</nav>` `</ul></nav>` | safeHTML) }}
+{{ if $showAnchor }}
+    {{ $.Scratch.Set "content" ($.Scratch.Get "content" | replaceRE "(<h[2-9] id=\"([^\"]+)\".+)(</h[2-9]+>)" `${1}&nbsp;<a class="gdoc-page__anchor" href="#${2}"><svg class="icon link"><use xlink:href="#link"></use></svg></a> ${3}</h>` | safeHTML) }}
+{{ end }}
+
+{{ $.Scratch.Get "content" }}