old_contents: # Examples of valid version strings
  # __version__ = '1.2.3.dev1'  # Development release 1
  # __version__ = '1.2.3a1'     # Alpha Release 1
  # __version__ = '1.2.3b1'     # Beta Release 1
  # __version__ = '1.2.3rc1'    # RC Release 1
  # __version__ = '1.2.3'       # Final Release
  # __version__ = '1.2.3.post1' # Post Release 1
  
  __version__ = '0.1.2'
  
new_contents: # Examples of valid version strings
  # __version__ = '1.2.3.dev1'  # Development release 1
  # __version__ = '1.2.3a1'     # Alpha Release 1
  # __version__ = '1.2.3b1'     # Beta Release 1
  # __version__ = '1.2.3rc1'    # RC Release 1
  # __version__ = '1.2.3'       # Final Release
  # __version__ = '1.2.3.post1' # Post Release 1
  
  __version__ = '0.1.2-dev'
  
subject: add -dev suffix to version for code in master