old_contents: 
  #
  # rpclib - Copyright (C) Rpclib contributors.
  #
  # This library is free software; you can redistribute it and/or
  # modify it under the terms of the GNU Lesser General Public
  # License as published by the Free Software Foundation; either
  # version 2.1 of the License, or (at your option) any later version.
  #
  # This library is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  # Lesser General Public License for more details.
  #
  # You should have received a copy of the GNU Lesser General Public
  # License along with this library; if not, write to the Free Software
  # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
  #
  
  __version__ = '2.5.0-beta'
  
  from rpclib._base import TransportContext
  from rpclib._base import EventContext
  from rpclib._base import MethodContext
  from rpclib._base import MethodDescriptor
  from rpclib._base import EventManager
  
  import sys
  
  if sys.version > '3':
      def _join(val):
          return bytes('').join(val)
  else:
      def _join(val):
          return ''.join(val)
  
  
new_contents: 
  #
  # rpclib - Copyright (C) Rpclib contributors.
  #
  # This library is free software; you can redistribute it and/or
  # modify it under the terms of the GNU Lesser General Public
  # License as published by the Free Software Foundation; either
  # version 2.1 of the License, or (at your option) any later version.
  #
  # This library is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  # Lesser General Public License for more details.
  #
  # You should have received a copy of the GNU Lesser General Public
  # License along with this library; if not, write to the Free Software
  # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
  #
  
  __version__ = '2.5.0-beta'
  
  from rpclib._base import TransportContext
  from rpclib._base import EventContext
  from rpclib._base import MethodContext
  from rpclib._base import MethodDescriptor
  from rpclib._base import EventManager
  
  import sys
  
  if sys.version > '3':
      def _join(val, joiner=''):
          return bytes(joiner).join(val)
  else:
      def _join(val, joiner=''):
          return joiner.join(val)
  
subject: add joiner to _join, #113