old_contents: import logging
  
  import django_anysign
  
  
  logger = logging.getLogger(__name__)
  
  
  class DummySignBackend(django_anysign.SignatureBackend):
      def __init__(self):
          super(DummySignBackend, self).__init__(
              name='DummySign',
              code='dummysign',
          )
  
      def create_signature(self, signature):
          """Register ``signature`` in backend, return updated object.
  
          As a dummy backend: just emit a log.
  
          """
          signature = super(DummySignBackend, self).create_signature(self)
          logger.debug('[django_dummysign] Signature created in backend')
          return signature
  
new_contents: import logging
  
  import django_anysign
  
  
  logger = logging.getLogger(__name__)
  
  
  class DummySignBackend(django_anysign.SignatureBackend):
      def __init__(self):
          super(DummySignBackend, self).__init__(
              name='DummySign',
              code='dummysign',
          )
  
      def create_signature(self, signature):
          """Register ``signature`` in backend, return updated object.
  
          As a dummy backend: just emit a log.
  
          """
          signature = super(DummySignBackend, self).create_signature(signature)
          logger.debug('[django_dummysign] Signature created in backend')
          return signature
  
subject: fix create_signature call for dummysign backend