anchor.diff:                      URL
                   </div>
                   <div class="col-md-10">
  -                    <%= link_to nil, @project.user_url %>
  +                    <%= link_to nil, @project.user_url, :target => 'blank' %>
                   </div>
               </div>
           <% end %>
  
positive.code:     <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) %>
      </button>
      <% end %>
      <div class="project-detail__define mt20">
  
negative.code:                     Github URL
                  </div>
                  <div class="col-md-10">
                      <%= link_to nil, @project.development_url, :target => 'blank' %>
                  </div>
              </div>
          <% end %>
  