_sass: GitHub-style code tags

_sass/overrides.scss

@@ -6,6 +6,12 @@ abbr[title] {
   text-decoration: none;
 }
 
+code {
+  font-size: 14px;
+  padding: 0.2em 0.4em;
+  border: none;
+}
+
 iframe,
 summary {
   margin-bottom: 1em;