old_contents: """
  Version.
  
  Doing it this way provides for access in setup.py and via __version__
  """
  __version__ = "0.4.10"
  
new_contents: """
  Version.
  
  Doing it this way provides for access in setup.py and via __version__
  """
  __version__ = "0.5.0"
  
subject: upgrade version to 0.5.0