Display breadcrumb only nested two or more levels

Author: unasuke

lib/rdoc/generator/template/darkfish/class.rhtml

@@ -18,17 +18,20 @@
 </nav>
 
 <main role="main" aria-labelledby="<%=h klass.aref %>">
-  <ol role="navigation" aria-label="breadcrumb" class="breadcrumb">
-    <% breadcrumb.each do |namespace| %>
-    <li>
-      <% if namespace[:self] %>
-      <span><%= namespace[:name] %></span>
-      <% else %>
-      <a href="<%= namespace[:path] %>"><%= namespace[:name] %></a><span>::</span>
+  <%# If nesting level is 1, breadcrumb list is not needed %>
+  <% if breadcrumb.size > 1 %>
+    <ol role="navigation" aria-label="breadcrumb" class="breadcrumb">
+      <% breadcrumb.each do |namespace| %>
+      <li>
+        <% if namespace[:self] %>
+        <span><%= namespace[:name] %></span>
+        <% else %>
+        <a href="<%= namespace[:path] %>"><%= namespace[:name] %></a><span>::</span>
+        <% end %>
+      </li>
       <% end %>
-    </li>
-    <% end %>
-  </ol>
+    </ol>
+  <% end %>
 
   <h1 id="<%=h klass.aref %>" class="anchor-link <%= klass.type %>">
     <%= klass.type %> <%= klass.full_name %>