anchor.diff:          <% @languages.each do |language| %>
             <li class='<%= 'active' if language.downcase == params[:language].try(:downcase) %>'>
               <% if language.downcase == params[:language].try(:downcase) %>
  -              <%= link_to language, url_for(params.merge(language: nil)) %>
  +              <%= link_to language, url_for(params.merge(language: nil).permit!) %>
               <% else %>
                 <%= link_to language, url_for(params.merge(language: language).permit!) %>
               <% end %>
  
positive.code:         <% @platforms.each do |platform| %>
            <li class='<%= 'active' if platform.downcase == params[:platform].try(:downcase) %>'>
              <% 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 %>
  
negative.code:         <% @licenses.each do |license| %>
            <li class='<%= 'active' if license.downcase == params[:license].try(:downcase) %>'>
              <% if license.downcase == params[:license].try(:downcase) %>
                <%= link_to license, url_for(params.merge(license: nil).permit!) %>
              <% else %>
                <%= link_to license, url_for(params.merge(license: license).permit!) %>
              <% end %>
  