old_contents: __description__ = "VOEvent Broker"
  __url__ = "http://comet.transientskp.org/"
  __author__ = "John Swinbank"
  __contact__ = "swinbank@princeton.edu"
  __version__ = "2.0.1"
  
new_contents: __description__ = "VOEvent Broker"
  __url__ = "http://comet.transientskp.org/"
  __author__ = "John Swinbank"
  __contact__ = "swinbank@princeton.edu"
  __version__ = "2.1.0-pre"
  
subject: Increment version number.