src/language-handlebars/printer-glimmer.js/printCloseBlock
function printCloseBlock(path, print, options) {
  const node = path.getValue();

  if (options.htmlWhitespaceSensitivity === "ignore") {
    const escape = blockStatementHasOnlyWhitespaceInProgram(node)
      ? softline
      : hardline;

    return [
      escape,
      printClosingBlockOpeningMustache(node),
      print("path"),
      printClosingBlockClosingMustache(node),
    ];
  }

  return [
    printClosingBlockOpeningMustache(node),
    print("path"),
    printClosingBlockClosingMustache(node),
  ];
}