old_contents: import sys
  
  from .middleware import Middleware
  from .base_manager import BaseManager
  from .pubsub_manager import PubSubManager
  from .kombu_manager import KombuManager
  from .redis_manager import RedisManager
  from .kafka_manager import KafkaManager
  from .zmq_manager import ZmqManager
  from .server import Server
  from .namespace import Namespace
  if sys.version_info >= (3, 5):  # pragma: no cover
      from .asyncio_server import AsyncServer
      from .asyncio_manager import AsyncManager
      from .asyncio_namespace import AsyncNamespace
      from .asyncio_redis_manager import AsyncRedisManager
  else:  # pragma: no cover
      AsyncServer = None
      AsyncManager = None
      AsyncNamespace = None
      AsyncRedisManager = None
  
  __version__ = '1.9.0'
  
  __all__ = ['__version__', 'Middleware', 'Server', 'BaseManager',
             'PubSubManager', 'KombuManager', 'RedisManager', 'KafkaManager', 
             'ZmqManager', 'Namespace']
  if AsyncServer is not None:  # pragma: no cover
      __all__ += ['AsyncServer', 'AsyncNamespace', 'AsyncManager',
                  'AsyncRedisManager']
  
new_contents: import sys
  
  from .middleware import Middleware
  from .base_manager import BaseManager
  from .pubsub_manager import PubSubManager
  from .kombu_manager import KombuManager
  from .redis_manager import RedisManager
  from .kafka_manager import KafkaManager
  from .zmq_manager import ZmqManager
  from .server import Server
  from .namespace import Namespace
  if sys.version_info >= (3, 5):  # pragma: no cover
      from .asyncio_server import AsyncServer
      from .asyncio_manager import AsyncManager
      from .asyncio_namespace import AsyncNamespace
      from .asyncio_redis_manager import AsyncRedisManager
  else:  # pragma: no cover
      AsyncServer = None
      AsyncManager = None
      AsyncNamespace = None
      AsyncRedisManager = None
  
  __version__ = '1.9.0'
  
  __all__ = ['__version__', 'Middleware', 'Server', 'BaseManager',
             'PubSubManager', 'KombuManager', 'RedisManager', 'KafkaManager',
             'ZmqManager', 'Namespace']
  if AsyncServer is not None:  # pragma: no cover
      __all__ += ['AsyncServer', 'AsyncNamespace', 'AsyncManager',
                  'AsyncRedisManager']
  
subject: Remove trailing whitespaces