old_contents: from .error import Error
  from .fts3 import Tokenizer, make_tokenizer_module, register_tokenizer
  from . import tokenizer, ranking
  
  __all__ = ['Tokenizer', 'make_tokenizer_module', 'register_tokenizer',
             'tokenizer', 'ranking']
  
new_contents: from .error import Error
  from .fts3 import Tokenizer, make_tokenizer_module, register_tokenizer
  from . import tokenizer, ranking
  
  __all__ = ['Tokenizer', 'make_tokenizer_module', 'register_tokenizer',
             'tokenizer', 'ranking', 'Error']
  
subject: fix a flake8 warning