old_contents: # Why this file? https://packaging.python.org/guides/single-sourcing-package-version/
  # How is version set? https://www.python.org/dev/peps/pep-0440/
  __version__ = '0.1.dev5'
  
new_contents: # Why this file? https://packaging.python.org/guides/single-sourcing-package-version/
  # How is version set? https://www.python.org/dev/peps/pep-0440/
  __version__ = '0.1.dev6'
  
subject: bump dev version for release