src/language-html/print/tag.js/printClosingTagSuffix
function printClosingTagSuffix(node, options) {
  return needsToBorrowParentClosingTagStartMarker(node)
    ? printClosingTagStartMarker(node.parent, options)
    : needsToBorrowNextOpeningTagStartMarker(node)
    ? printOpeningTagStartMarker(node.next)
    : "";
}