anchor.diff:          </style>
   
           <%= stylesheet_link_tag 'https://factor.io/assets/landing.css' %>
  +        <%= stylesheet_link_tag '//maxcdn.bootstrapcdn.com/font-awesome/4.1.0/css/font-awesome.min.css' %>
           
       </head>
   
  
positive.code:             /*<%= Rouge::Themes::Base16.mode(:light).render(scope: '.highlight') %>*/
              <%= Rouge::Themes::Github.render(scope: '.highlight') %>
  
              div[role=main] > .step_link{
                text-decoration: none;
              }
  
negative.code:                       <a href="/<%= previous_page.path %>" class='step_link'>Previous: <%= previous_page.data.title %></a>
                      <% end %>
                    <% end %>
  
                    <div class='edit'>
                      <i class='fa fa-github fa-fw'></i>
                      <% source_paths = current_page.source_file.split('/') %>
                      <% path = source_paths[source_paths.index('source')+1..-1] %>
                      <% code_url = "https://github.com/factor-io/docs/tree/master/source/#{path.join('/')}" %>
                      <a href="<%=code_url%>">Edit this page on Github</a>
  
                    </div>
                  </div>
              </div>
  
  