prettier/tests/trailing_comma/es5.js

function send_single_email(
  app,
  email_id,
  email_address,
  subject,
  html,
  reply_to
) {
  send_single_email_implementation(  app,
  email_id,
  email_address,
  subject,
  html,
  reply_to);
  return "nothing";
}