old_contents: def hello():
      """usage: say hello"""
      print('Hello!')
  
  
  def hiya(name):
      """usage: say hiya <name>"""
      print('Hiya, {name}!'.format(name=name))
  
  
  def validate_name(**cli_args):
      assert '--name' in cli_args
      assert str(cli_args['--name'])
      assert len(cli_args['--name'])
      return cli_args
  
  hiya.validate = validate_name
  
new_contents: def hello():
      """usage: say hello"""
      print('Hello!')
  
  
  def hiya(name):
      """usage: say hiya <name>"""
      print('Hiya, {name}!'.format(name=name))
  
  
  def validate_name(**cli_args):
      assert '--name' in cli_args
      assert str(cli_args['--name'])
      assert len(cli_args['--name'])
      return cli_args
  
  
  hiya.validate = validate_name
  
subject: Fix flake8 errors.