anchor.diff:                  type: 'button',
                   id: 'edit-canvas-button',
                   data: { action: 'edit' },
  -                class: 'ajax btn btn-default' do %>
  +                class: 'ajax btn btn-primary' do %>
                     <span class="fas fa-pencil-alt"></span>
                     <span class="hidden-xs"><%=t 'experiments.canvas.canvas_edit' %></span>
                   <% end %>
  
positive.code: <%= javascript_include_tag("eventPause-min") %>
  
  <%= javascript_include_tag("projects/canvas") %>
  <%= javascript_include_tag("experiments/dropdown_actions") %>
  
negative.code:             <% end %>
            </div>
          </div>
        </div>
      </div>
    </div>
  