message: fix: handle special case for allowfullscreen on <embed>
  close
diff: @@ -64,7 +64,12 @@ function setAttr (el: Element, key: string, value: any) {
  if (isFalsyAttrValue(value)) {
  el.removeAttribute(key)
  } else {
  - el.setAttribute(key, key)
  + // technically allowfullscreen is a boolean attribute for <iframe>,
  + // but Flash expects a value of "true" when used on <embed> tag
  + value = key === 'allowfullscreen' && el.tagName === 'EMBED'
  + ? 'true'
  + : key
  + el.setAttribute(key, value)
  }
  } else if (isEnumeratedAttr(key)) {
  el.setAttribute(key, isFalsyAttrValue(value) || value === 'false' ? 'false' : 'true')
  