old_contents: version_info = (0, 4, 0, "a5")
  __version__ = ".".join(map(str, version_info))
  
new_contents: version_info = (0, 4, 0)
  __version__ = ".".join(map(str, version_info))
  
subject: bump version to 0.4.0 (when the "batch" branch is ready we publish)