anchor.diff:              </div>
             </div>
             <div class="modal-footer">
  -            <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
  +            <button type="button" class="btn btn-default" data-dismiss="modal"
  +                >Close</button>
             </div>
           </div>
         </div>
  
positive.code: 
              <div id="add-files-container">
                <h4>Add files</h4>
                <em>Note: binary files and subdirectories of <tt>__MACOSX</tt> will be ignored.</em>
                <%= form_for(:project_file, url: "/projects/#{@project_id}/files") do |f| %>
                    <%= f.file_field :files, multiple: true, class: "form-control file-upload-selection" %>
                    <!-- <input type="file" multiple="true" name="project_file[files][]" 
                      class="file-upload-selection"> -->
                    <input type="hidden" id="directory_id" 
                    name="project_file[directory_id]" value=""/>
                <% end %>
  
negative.code:       <input class="dir-select file-select hidden" type="checkbox">
  
        <span class="remove-file-indicator remove-file hidden">
          <span class="glyphicon glyphicon-remove-circle aria-hidden="true""
              ></span>
        </span>
        <span class="collapsed">
          <span class="glyphicon glyphicon-folder-close aria-hidden="true""
              ></span>
        </span>
        <span class="expanded">
          <span class="glyphicon glyphicon-folder-open aria-hidden="true""></span>
  