old_contents: #!/usr/bin/env python
  
  
  # For acceptable version formats, see https://www.python.org/dev/peps/pep-0440/
  __version__ = '1.1.2'
  
new_contents: #!/usr/bin/env python
  
  
  # For acceptable version formats, see https://www.python.org/dev/peps/pep-0440/
  __version__ = '1.2.dev1'
  
subject: Bump version to 1.2.dev