old_contents: __version_info__ = (0, 2, 2, 'a0')
  __version__ = '.'.join(map(str, __version_info__[:3]))
  if len(__version_info__) == 4:
      __version__ += __version_info__[-1]
  
new_contents: __version_info__ = (0, 2, 2, 'a1')
  __version__ = '.'.join(map(str, __version_info__[:3]))
  if len(__version_info__) == 4:
      __version__ += __version_info__[-1]
  
subject: bump v0.2.2a1