anchor.diff:      <!-- if a customer is signed in display navbar with sufficient privilidges -->
       <% if current_user.customer? %>
         <ul><li><a class="navbar-brand" href="/pages/home">Home</a></li>
  +        <li><a class="navbar-brand" href="/extras">Extras</a></li>
           <li>
             <a class="navbar-brand" href="/rooms">Rooms</a>
           </li>
  
positive.code:      </ul>
      </li>
      <ul><li><a class="navbar-brand" href="/extras">Extras</a></li>
       <li>
        <a class="navbar-brand" href="/rmcats">Extra Types</a>
        <ul>
         <li><a class="navbar-brand" href="/extracats">View Extra Types</a></li>
         <li><a class="navbar-brand" href="/extracats/new">New Extra Type</a></li>
        </ul>
       </li>
      <li>
      Account
      <ul>
  
negative.code:           <a class="navbar-brand" href="/rooms">Rooms</a>
          </li>
          <li><a class="navbar-brand" href="/pages/contactus">Contact us</a></li>
          <li><a class="navbar-brand" href="/extras">Extras</a></li>
          <li>
          Account
          <ul>
  