app/views/popular_sidebar/_content.html.erb
<h3 class="sidebar-title"><%= sidebar.title %></h3>
<div class="sidemenu-content">
<ul class="popular_sidebar">
<% if sidebar.popular.empty? || sidebar.popular.size == 0 %>
<li class="alert"><%= t('.nothing_to_show_yet') %> !</li>
<% else %>
<% sidebar.popular.each do |article| %>
<%= sprintf('%s (%s)', link_to_permalink(article, article.title), t('.comments', count: article.comment_count)) %>
<% end %>
<% end %>
</li>
</ul>
</div>