anchor.diff:              <% if license.downcase == params[:license].try(:downcase) %>
                 <%= link_to license, url_for(params.merge(license: nil)) %>
               <% else %>
  -              <%= link_to license, url_for(params.merge(license: license)).permit! %>
  +              <%= link_to license, url_for(params.merge(license: license).permit!) %>
               <% end %>
             </li>
           <% end %>
  
positive.code:             <% if platform.downcase == params[:platform].try(:downcase) %>
                <%= link_to platform, url_for(params.merge(platform: nil)) %>
              <% else %>
                <%= link_to platform, url_for(params.merge(platform: platform)).permit! %>
              <% end %>
            </li>
          <% end %>
  
negative.code:             <% if language.downcase == params[:language].try(:downcase) %>
                <%= link_to language, url_for(params.merge(language: nil)) %>
              <% else %>
                <%= link_to language, url_for(params.merge(language: language).permit!) %>
              <% end %>
            </li>
          <% end %>
  