README.md in rails_amp-0.1.5 vs README.md in rails_amp-0.1.6

@@ -249,10 +249,10 @@
 <link rel="canonical" href="http://example.com/home/index" />
 ```
 
 If you want to use the root_url as the canonical url, you should customize the codes.
 
-```html
+```ruby
 <% if controller_name == 'home' && action_name == 'index'  %>
   <link rel="canonical" href="<%= root_url %>" />
 <% else %>
   <link rel="canonical" href="<%= rails_amp_canonical_url %>" />
 <% end %>