old_contents: from django.dispatch import Signal
  
  notify = Signal(providing_args=[
      'recipient', 'actor', 'verb', 'action_object', 'target', 'description',
      'timestamp', 'level'
  ])
  
new_contents: ''' Django notifications signal file '''
  from django.dispatch import Signal
  
  notify = Signal(providing_args=[  # pylint: disable=invalid-name
      'recipient', 'actor', 'verb', 'action_object', 'target', 'description',
      'timestamp', 'level'
  ])
  
subject: Improve code quality on signals.py