apply missing requeriments in PR #3043

In this PR https://github.com/consul/consul/pull/3043
there were some change requests. In order to keep moving
we decided to merge the PR and do the changes ourselves.

app/views/admin/site_customization/content_blocks/index.html.erb

@@ -54,5 +54,5 @@
 <% else %>
   <div class="callout primary">
     <%= t("admin.site_customization.content_blocks.no_blocks") %>
-  </div-->
+  </div>
 <% end %>