Add an .active class to current active link in the nav bar

layouts/partials/header.html

@@ -9,7 +9,11 @@
       {{ with site.Menus.main }}
       <nav class="site bulleted">
         {{ range . }}
-        <li><a class="{{ if eq .URL $url }}active{{ end }}" href="{{ .URL }}"><span>{{ .Name }}</span></a></li>
+          {{ if eq .URL $url }}
+          <li class="active"><span>{{ .Name }}</span></li>
+          {{ else }}
+          <li><a href="{{ .URL }}"><span>{{ .Name }}</span></a></li>
+          {{ end }}
         {{ end }}
       </nav>
       {{ end }}