anchor.diff:          <%= f.text_area :message,
                           cols: 65,
                           rows: 8,
  -                        onchange: 'set_onbeforeunload(true);' %>
  +                        onchange: 'set_onbeforeunload(true);',
  +                        disabled: @assignment.is_peer_review? ? 'true' : 'false' %>
         </div>
   
         <% unless @sections.empty? %>
  
positive.code:         <%= f.text_field :description,
                           onchange: 'set_onbeforeunload(true);',
                           size: 35,
                           required: true %>
        </div>
  
        <div>
  
negative.code:                          onchange: 'set_onbeforeunload(true);',
                           size: 35,
                           maxlength: 30,
                           required: true,
                           disabled: @assignment.is_peer_review? ? 'true' : 'false' %>
        </div>
  
        <div>
  