old_contents: ''' Django notifications signal file '''
  # -*- coding: utf-8 -*-
  from django.dispatch import Signal
  
  notify = Signal(providing_args=[  # pylint: disable=invalid-name
      'recipient', 'actor', 'verb', 'action_object', 'target', 'description',
      'timestamp', 'level'
  ])
  
new_contents: ''' Django notifications signal file '''
  # -*- coding: utf-8 -*-
  from django.dispatch import Signal
  
  notify = Signal()
  
subject: make it compatible to Django 4.X. (#323)