anchor.diff:  
   <br/>
   
  -<%= link_to 'New child', new_child_path %>
  +<%= link_to "Back", admin_path() %>
  
positive.code: 
  <h2>All children</h2>
  <table>
    <thead>
    <tr>
  
negative.code:   </tr>
    </thead>
    <tbody>
    <% @children.each do |child| %>
        <tr>
          <td class="checkbox"></td>
  