Fixed header link

.themes/classic/source/_includes/header.html

@@ -1,5 +1,5 @@
 <hgroup>
-  <h1><a href="{{ site.root }}">{{ site.title }}</a></h1>
+  <h1><a href="{{ site.root }}/">{{ site.title }}</a></h1>
   {% if site.subtitle %}
     <h2>{{ site.subtitle }}</h2>
   {% endif %}