anchor.diff:      <title>RAND-bnb</title>
       <style>
   body{
  -  background-color: grey;
  +  background-color: white;
     margin-top: auto;
     margin-right: auto;
     margin-left: auto;
  
positive.code:         </form>
        </a>
      </li>
        </ul>
      </div>
  
  
negative.code:         <b href='/'>
            <img src="../images/logo.jpg">
          </b>
          <% if current_user  %>
          <li class="button_topnav">
            <a>
              <form action='/sessions' method ='post' >
  