anchor.diff:          </div>
           <div class="col-6 col-md-3">
             <ul class="list-unstyled mb-0">
  -            <li><a href="#">Other link</a></li>
  +            <li><a href="#">GitHub</a></li>
               <li><a href="#">Last link</a></li>
             </ul>
           </div>
  
positive.code:             </button>
            </div>
          <% end %>
        </div>
  
        <% if flash[:alert] %>
          <div class="alert alert-danger alert-dismissible fade show" role="alert">
            <%= flash[:alert] %>
            <button type="button" class="close" data-dismiss="alert" aria-label="Close">
              <span aria-hidden="true">&times;</span>
            </button>
          </div>
        <% end %>
  
        <%= yield %>
  
  
negative.code:                 <%= link_to("Profile", profile_path, class: "nav-link") %>
                </li>
                <li class="nav-item">
                  <%#= link_to("Sign Out", sign_out_path, method: :delete, class: "nav-link") %>
                </li>
              <% else %>
                <li class="nav-item">
                  <%= link_to("Sign In", new_user_session_path, class: "nav-link") %>
                </li>
                <li class="nav-item">
                  <%= link_to("Sign Up", new_user_registration_path, class: "nav-link") %>
                </li>
              <% end %>
              <li class="nav-item dropdown">
  