match the background of pre with code (the github theme of highlight.js defined the background of code to be #f8f8f8)

exampleSite/layouts/partials/foot_custom.html

@@ -2,3 +2,11 @@
 <script async src="//cdn.bootcss.com/mathjax/2.7.1/MathJax.js?config=TeX-MML-AM_CHTML"></script>
 
 <script async src="//yihui.name/js/center-img.js"></script>
+
+<script src="//cdn.bootcss.com/highlight.js/9.12.0/highlight.min.js"></script>
+<script src="//cdn.bootcss.com/highlight.js/9.12.0/languages/r.min.js"></script>
+
+<script>
+hljs.configure({languages: []});
+hljs.initHighlightingOnLoad();
+</script>

exampleSite/layouts/partials/head_custom.html

@@ -0,0 +1 @@
+<link href="//cdn.bootcss.com/highlight.js/9.12.0/styles/github.min.css" rel="stylesheet">

layouts/_default/single.html

@@ -3,13 +3,6 @@
 <h1><span class="title">{{ .Title }}</span></h1>
 {{ with .Params.author }}<h2 class="author">{{ . }}</h2>{{ end }}
 {{ if (gt .Params.date 0) }}<h2 class="date">{{ .Date.Format "2006/01/02" }}</h2>{{ end }}
-<p class="terms">
-  {{ range $i := (slice "categories" "tags") }}
-  {{ with ($.Param $i) }}
-  {{ $i | title }}: {{ range $k := . }}<a href="{{ relURL (print "/" $i "/" $k | urlize) }}">{{$k}}</a> {{ end }}
-  {{ end }}
-  {{ end }}
-</p>
 </div>
 
 <main>

static/css/style.css

@@ -14,7 +14,6 @@ body {
   padding: 5px;
   border-radius: 5px;
 }
-.terms { font-size: .9em; }
 .menu, .article-meta, footer { text-align: center; }
 .title { font-size: 1.1em; }
 footer a { text-decoration: none; }
@@ -27,6 +26,7 @@ hr {
 pre {
   border: 1px solid #ddd;
   box-shadow: 5px 5px 5px #eee;
+  background: #f8f8f8;
   padding: 1em;
   overflow-x: auto;
 }