anchor.diff:        </div>
   
         <div class="FormField__input">
  +        <% if @lesson_obj.attributes['duration'] %>
           <input type="text" name="lesson[duration]" class="Input" value="<%= @lesson_obj.duration %>" placeholder="Approximately" id="lesson_duration" />
  +        <% end %>
         </div>
   
       </div>
  
positive.code:     <div class="FormField FormField--required FormField--with-padding">
  
        <div class="FormField__info">
          <label class="FormField__label" for="lesson_contexts">Digital Fabrication Tools</label>
          <div class="FormField__hint">Which digital fabrication tools are explored in this lesson?</div>
        </div>
  
  
negative.code: 
      </div>
  
      <!-- lesson.duration -->
      <div class="FormField FormField--required FormField--with-padding">
  
  