src/language-html/print/tag.js/printClosingTagEndMarker
function printClosingTagEndMarker(node, options) {
  if (shouldNotPrintClosingTag(node, options)) {
    return "";
  }
  switch (node.type) {
    case "ieConditionalComment":
    case "ieConditionalEndComment":
      return "[endif]-->";
    case "ieConditionalStartComment":
      return "]><!-->";
    case "interpolation":
      return "}}";
    case "element":
      if (node.isSelfClosing) {
        return "/>";
      }
    // fall through
    default:
      return ">";
  }
}