anchor.diff:  
       <!-- Main jumbotron for a primary marketing message or call to action -->
       <div class="container">
  -      <%= render partial: 'flash' %>
  -      <%= yield %>
  +      <div class="row">
  +        <div class="col-xs-12 col-sm-9">
  +          <%= render partial: 'flash' %>
  +          <%= yield %>
  +        </div>
  +      </div>
       </div>
   
       <hr>
  
positive.code:                 </p>
                </li>
                <li>
                  <%= link_to "Logout", destroy_user_session_path(current_user), method: :delete %>
                </li>
              <% else %>
                <li>
                  <%= link_to "Login", new_user_session_path %>
                </li>
              <% end %>
            </ul>
  
negative.code:       <div class="container">
          <!-- Brand and toggle get grouped for better mobile display -->
          <div class="navbar-header">
            <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
              <span class="icon-bar"></span>
              <span class="icon-bar"></span>
              <span class="icon-bar"></span>
            </button>
            <a class="navbar-brand" href="<%= root_path %>">Gandalf</a>
          </div>
  