## mark a section (Learn more)

class # This is articles/article.rhtml <h2><%= @article.title %></h2> <p> <%= @article.body %> </p> <% if @article.has_comments? %> <ul> <%= render :partial => 'comment', :collection => comment.children %> </ul> <% end %> # This is articles/_comment.rhtml <li> <%= comment.title %> <p> <%= comment.body %> </p> <% if comment.has_children? %> <ul> <%= render :partial => 'comment', :collection => comment.children %> </ul> <% end %> </li>

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