anchor.diff:      <div class="large-12 columns">
         <div class="nav-bar right">
          <ul class="button-group">
  -         <li><a href="#" class="button">Link 1</a></li>
  +         <li><a href= "/home" class="button">Home</a></li>
            <li><a href="#" class="button">Link 2</a></li>
            <li><a href="#" class="button">Link 3</a></li>
  -         <li><a href="#" class="button">Link 4</a></li>
  +         <li><a href="http://www.amazon.com" class="button">Buy more books at Amazon.com!</a></li>
           </ul>
         </div>
         <h1>Library <small>Adv. Rails Summer 2014 Project.</small></h1>
  
positive.code:  
      </aside>
   
       
    </div>
   
    <footer class="row">
  
negative.code:    
   
    <div class="row">
    
    <div class="large-9 columns" role="content">
   
      <table>
       
        <thead>
          <tr>
            <th>Title</th>
            <th>Author</th>
            <th>ISBN</th>
            <th colspan="3">Actions</th>
          </tr>
        </thead>
  
        <tbody>
          <% @books.each do |book| %>
            <tr>
              <td><%= book.title %></td>
              <td><%= book.author %></td>
              <td><%= book.ISBN %></td>
              <td><%= link_to 'Show', book %></td>
              <td><%= link_to 'Edit', edit_book_path(book) %></td>
              <td><%= link_to 'Destroy', book, method: :delete, data: { confirm: 'Are you sure?' } %></td>
            </tr>
          <% end %>
        </tbody>
       
       </table>
   
      </div>
   
      <aside class="large-3 columns">
   
        <h5>Reviews & Comments </h5>
        <ul class="side-nav">
          <li><a href="#">Comment 1</a></li>
          <li><a href="#">Comment 2</a></li>
          <li><a href="#">Etc.</a></li>
        </ul>
   
        <div class="panel">
  