function RawDescriptionHelpFormatter(options) {
  HelpFormatter.call(this, options);
}
new RawDescriptionHelpFormatter(options)
new ArgumentParser({formatterClass: argparse.RawDescriptionHelpFormatter, ...})

Help message formatter which retains any formatting in descriptions.

Only the name of this class is considered a public API. All the methods
provided by the class are considered an implementation detail.