anchor.diff:    <div class="taxon-focus <%= has_parents %> <%= has_children %> <%= multiple_parents %> <%= multiple_children %>">
       <div class="taxon-level taxon-depth-0">
          <span class="taxon-level-title">
  -         <%= page.taxonomy_tree.root_node.internal_name %>
  +         <%= page.taxonomy_tree.root_node.title %>
          </span>
       </div>
     </div>
  
positive.code:       <div class="parent-expansion">
          <div class="taxon-level taxon-depth-1">
            <span class="taxon-level-title">
              <%= link_to parent_node.internal_name, taxon_path(parent_node.content_id) %>
            </span>
          </div>
          <% parent_node.each do |parent_ancestor| %>
            <% next if parent_ancestor.depth == 1 %>
            <div class="taxon-level taxon-depth-<%= parent_ancestor.depth %>">
              <span class="taxon-level-title">
                <%= link_to parent_ancestor.internal_name, taxon_path(parent_ancestor.content_id) %>
              </span>
            </div>
          <% end %>
  
negative.code:       <div class="child-expansion">
          <div class="taxon-level taxon-depth-1">
            <span class="taxon-level-title">
              <%= link_to child_node.title, taxon_path(child_node.content_id) %>
            </span>
          </div>
          <% child_node.each do |child_successor| %>
            <% next if child_successor.depth == 1 %>
            <div class="taxon-level taxon-depth-<%= child_successor.depth %>">
              <span class="taxon-level-title">
                <%= link_to child_successor.title, taxon_path(child_successor.content_id) %>
              </span>
            </div>
          <% end %>
  