message: add comment explaining why we need direct DOM access
diff: @@ -81,6 +81,13 @@ describe('Details', () => {
  }</Details>
  )
  + /**
  + * XXX note: when using the react element wrapper, the
  + * selector '[open]' doesn't properly resolve the presence
  + * of the 'open' HTML attribute. To get around this, we have
  + * to test the underlying DOM node's actual 'open'
  + * attribute.
  + */
  const dom = wrapper.getDOMNode()
  const summary = wrapper.find('summary')
  