old_contents: import argparse
  
  parser = argparse.ArgumentParser(description='Migrate toilet codes')
  parser.add_argument(
      'url', type=str,
      help='The base URL for the django toilet database')
  parser.add_argument(
      'username', type=str, help='The username used to log in')
  parser.add_argument(
      'password', type=str, help='The password used to log in')
  
new_contents: import argparse
  
  parser = argparse.ArgumentParser(description='Migrate toilet codes')
  parser.add_argument(
      'url', type=str,
      help='The base URL for the django toilet database')
  parser.add_argument(
      'username', type=str, help='The username used to log in')
  parser.add_argument(
      'password', type=str, help='The password used to log in')
  parser.add_argument(
      '--dryrun', '-d', action='store_true',
      help='Print out changes instead of uploading them.')
  args = parser.parse_args()
  
subject: Add dryrun command line argument