anchor.diff:    end
   
     tabs = [
  -    link_to(:show_user_contributors.t, controller: :users,
  -            action: :by_contribution)
  +    link_to(:show_user_contributors.t, users_by_contribution_path)
     ]
     if @show_user == @user
       tabs += [
  
positive.code:         <% if @observations %>
            <% @observations.values_at(0, 2, 4).reject(&:nil?).each do |obs| %>
              <%= thumbnail(obs.thumb_image,
                            link: {controller: obs.show_controller, action: obs.show_action, id: obs.id},
                            votes: true) %>
            <% end %>
          <% end %>
  
negative.code:         <% if @observations %>
            <% @observations.values_at(1, 3, 5).reject(&:nil?).each do |obs| %>
              <%= thumbnail(obs.thumb_image,
                            link: {controller: obs.show_controller,
                                   action: obs.show_action, id: obs.id},
                            votes: true) %>
            <% end %>
          <% end %>
  