anchor.diff:    <% if content_type.new.respond_to?(:universe) %>
       <div class="btn-group card">
         <a
  -        class='dropdown-trigger btn tooltipped <%= Universe.color if @universe_scope.present? %> lighten-5'
  +        class='dropdown-trigger btn white tooltipped <%= Universe.color if @universe_scope.present? %> lighten-5'
           href='#'
           data-position="bottom"
           data-delay="500"
  
positive.code:     </div>
    <% end %>
  
    <a class='btn <%= 'yellow lighten-3' if params.key?(:favorite_only) %> black-text tooltipped'
        href="<%= url_for(params.permit(:universe, :favorite_only).merge({favorite_only: params.key?(:favorite_only) ? nil : 1})) %>"
        data-position="bottom"
        data-delay="500"
  
negative.code:   <% if @page_tags.present? && @page_tags.any? %>
      <div class="btn-group card">
        <a
          class='dropdown-trigger btn white <%= content_type.color if @filtered_page_tags.present? %> lighten-4 black-text tooltipped'
          href='#'
          data-target='tag-filter-dropdown'
          data-position="bottom"
  