anchor.diff:          <div class="modal-content">
   
             <div class="modal-header">
  -            <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
  -            <h3 class="modal-title" id="project-sharing-title">Share project</h3>
  +            <button type="button" class="close" data-dismiss="modal" 
  +                aria-label="Close"><span aria-hidden="true">&times;</span
  +            ></button>
  +            <h3 class="modal-title" id="project-sharing-title"
  +                >Share project</h3>
             </div>
             <div class="modal-body">
               <h3>Share with specific users</h3>
  
positive.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>
  
negative.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="hidden" id="directory_id" 
                    name="project_file[directory_id]" value=""/>
                <% end %>
  