anchor.diff:                                      E-waste, batteries, and lights
                                   </div>
                                   <div class="project-name">
  +                                    <% @electronics_examples.join(",") %>
                                       <% @electronics_examples.each do |electronics_example| %>
  -                                        <%= electronics_example %>
  +                                        <%= electronics_example %><%= "," unless electronics_example == @electronics_examples.last %>
                                       <% end %> 
                                   </div>
                               </div>
  
positive.code:                                 </div>
                                  <div class="project-name">
                                      <% @plastic_examples.each do |plastic_example| %>
                                          <%= plastic_example %>
                                      <% end %>
                                  </div>
                              </div>
  
negative.code:                                 </div>
                                  <div class="project-name">
                                      <% @glass_examples.each do |glass_example| %>
                                          <%= glass_example %><%= "," unless glass_example == @glass_examples.last %>
                                      <% end %>
                                  </div>
                              </div>
  