anchor.diff:  
     <thead>
       <tr>
  -      <th>
  -        <%= check_box_tag "action-toggle", "", false, :class => "action-toggle" %>
  -      </th>
  +      <% if controller.respond_to?(:bulk) %>
  +        <th><%= check_box_tag "action-toggle", "", false, :class => "action-toggle" %></th>
  +      <% end %>
         <% headers.each do |header| %>
           <th><%= header %></th>
         <% end %>
  
positive.code: 
    <thead>
      <tr>
        <th>
          <%= check_box_tag "action-toggle", "", false, :class => "action-toggle" %>
        </th>
        <% headers.each do |header| %>
          <th><%= header %></th>
        <% end %>
  
negative.code: 
    <% items.each do |item| %>
      <tr class="<%= cycle('even', 'odd') %>" id="<%= dom_id(item) %>">
        <% if controller.respond_to?(:bulk) %>
          <td width="16">
            <%= check_box_tag "selected_item_ids[]", item.id, false, :class => "action-select" %>
          </td>
        <% end %>
        <% table_fields_for_item(item, fields).each_with_index do |field, index| %>
          <td>
            <%= field %>
  