old_contents: """ Python 'bz2_codec' Codec - bz2 compression encoding
  
      Unlike most of the other codecs which target Unicode, this codec
      will return Python string objects for both encode and decode.
  
      Adapted by Raymond Hettinger from zlib_codec.py which was written
      by Marc-Andre Lemburg (mal@lemburg.com).
  
  """
  import codecs
  import bz2
  
  def encode(input, errors='strict'):
      assert errors == 'strict'
      output = bz2.compress(input)
      return (output, len(input))
  
  def decode(input, errors='strict'):
      assert errors == 'strict'
      output = bz2.decompress(input)
      return (output, len(input))
  
  ### encodings module API
  
  def getregentry():
  
      return (encode, decode, codecs.StreamReader, codecs.StreamWriter)
  
new_contents: """ Python 'bz2_codec' Codec - bz2 compression encoding
  
      Unlike most of the other codecs which target Unicode, this codec
      will return Python string objects for both encode and decode.
  
      Adapted by Raymond Hettinger from zlib_codec.py which was written
      by Marc-Andre Lemburg (mal@lemburg.com).
  
  """
  import codecs
  import bz2 # this codec needs the optional bz2 module !
  
  ### Codec APIs
  
  def bz2_encode(input,errors='strict'):
  
      """ Encodes the object input and returns a tuple (output
          object, length consumed).
  
          errors defines the error handling to apply. It defaults to
          'strict' handling which is the only currently supported
          error handling for this codec.
  
      """
      assert errors == 'strict'
      output = bz2.compress(input)
      return (output, len(input))
  
  def bz2_decode(input,errors='strict'):
  
      """ Decodes the object input and returns a tuple (output
          object, length consumed).
  
          input must be an object which provides the bf_getreadbuf
          buffer slot. Python strings, buffer objects and memory
          mapped files are examples of objects providing this slot.
  
          errors defines the error handling to apply. It defaults to
          'strict' handling which is the only currently supported
          error handling for this codec.
  
      """
      assert errors == 'strict'
      output = bz2.decompress(input)
      return (output, len(input))
  
  class Codec(codecs.Codec):
  
      def encode(self, input, errors='strict'):
          return bz2_encode(input, errors)
      def decode(self, input, errors='strict'):
          return bz2_decode(input, errors)
  
  class StreamWriter(Codec,codecs.StreamWriter):
      pass
  
  class StreamReader(Codec,codecs.StreamReader):
      pass
  
  ### encodings module API
  
  def getregentry():
  
      return (bz2_encode,bz2_decode,StreamReader,StreamWriter)
  
subject: Revert previous change. MAL preferred the old version.