anchor.diff:    <tr>
       <th>ステータス</th>
       <th><%= getLongName('delivery_mails', 'subject') %></th>
  -    <th><%= getLongName('delivery_mails', 'content') %></th>
       <th><%= getLongName('delivery_mails', 'mail_from_name') %></th>
       <th><%= getLongName('delivery_mails', 'mail_from') %></th>
       <th><%= getLongName('delivery_mails', 'mail_cc') %></th>
  
positive.code:       <%= delivery_mail.mail_status_type_name %>
      </td>
      <td><%= back_to_link delivery_mail.subject, {:action => :show, :id => delivery_mail.id } %></td>
      <td><%= delivery_mail.content %></td>
      <td><%= delivery_mail.mail_from_name %></td>
      <td><%= delivery_mail.mail_from %></td>
      <td><%= delivery_mail.mail_cc %></td>
  
negative.code:     <td><%= delivery_mail.send_end_at %></td>
      <td>
        <% if delivery_mail.mail_status_type == 'unsend' %>
          <%= back_to_link 'キャンセル', { :action => :cancel, :id => delivery_mail.id, :authenticity_token => form_authenticity_token }, :method => :put, data: { :confirm => 'キャンセルします。よろしいですか?' } %>
        <% end %>
      </td>
    </tr>
  