anchor.diff:      <h1 class="mb20"><%= @project.subject %></h1>
       <% if authorized? && @project.editable_user_id?(@my_user.id) %>
       <button type="button" class="btn btn-default btn-primary btn-sm" aria-label="Left Align">
  -            <%= link_to('編集する', edit_project_path) %>
  +        <%= link_to('編集する', edit_project_path) %>
       </button>
       <% end %>
       <div class="project-detail__define mt20">
  
positive.code:                     Github URL
                  </div>
                  <div class="col-md-10">
                      <%= link_to nil, @project.development_url %>
                  </div>
              </div>
          <% end %>
  
negative.code:                     URL
                  </div>
                  <div class="col-md-10">
                      <%= link_to nil, @project.user_url, :target => 'blank' %>
                  </div>
              </div>
          <% end %>
  