go back to outlining inline code (single backticks) with light border

and make it possible to use code in post/page titles

layouts/_default/single.html

@@ -5,7 +5,7 @@
       <a class="no-underline" href="{{ .Permalink }}" title="{{ .Date.Format "Mon, Jan 2 2006 3:04:05 PM MST" }}">{{ .Date.Format "January 2, 2006" }}</a>{{ with .Scratch.Get "sourceURL" }}<span class="dash">—</span><a class="no-underline" href="{{ . | safeURL }}" title="Edit this post on GitHub" target="_blank" rel="noopener">Improve This Post</a>{{ end }}
     </div>
 
-    <h1 id="title"><a class="no-underline" href="{{ .Permalink }}">{{ .Title | markdownify }}</a></h1>
+    <h1 class="title"><a class="no-underline" href="{{ .Permalink }}">{{ .Title | markdownify }}</a></h1>
 
     <div id="content">
       {{ .Content }}