anchor.diff:                  <%= 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") %>
  +                <%#= link_to("Sign Out", sign_out_path, method: :delete, class: "nav-link") %>
                 </li>
               <% else %>
                 <li class="nav-item">
  -                <%= link_to("Sign In", sign_in_path, class: "nav-link") %>
  +                <%= link_to("Sign In", new_user_session_path, class: "nav-link") %>
                 </li>
                 <li class="nav-item">
  -                <%= link_to("Sign Up", sign_up_path, class: "nav-link") %>
  +                <%= link_to("Sign Up", new_user_registration_path, class: "nav-link") %>
                 </li>
               <% end %>
               <li class="nav-item dropdown">
  
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:         </div>
          <div class="col-6 col-md-3">
            <ul class="list-unstyled mb-0">
              <li><a href="#">GitHub</a></li>
              <li><a href="#">Last link</a></li>
            </ul>
          </div>
  