anchor.diff:      <% end %>
   
       <!-- Email address -->
  -    <% if @permit.email.length >= 1 %>
  +    <% if @permit.email.length != nil  %>
         <tr>
           <td>Email Address</td>
           <td><%= @permit.email %></td>
  
positive.code:     <% end %>
  
      <!-- Homeowner name -->
      <% if @permit.owner_name.length >= 1 %>
        <tr>
          <td>Owner name</td>
          <td><%= @permit.owner_name %></td>
  
negative.code:     <% end %>
  
      <!-- Air conditioning type -->
      <% if @permit.ac  != nil  %>
        <tr>
          <td>Air conditioning type</td>
          <td><%= @permit.ac %></td>
  