old_contents: __author__ = 'Arve Seljebu'
  __email__ = 'arve.seljebu@gmail.com'
  __version__ = '0.0.1'
  
  __all__ = ['CAM']
  
  from cam import CAM
  
new_contents: __author__ = 'Arve Seljebu'
  __email__ = 'arve.seljebu@gmail.com'
  __version__ = '0.0.1'
  
  __all__ = ['CAM']
  
  from .cam import CAM
  
subject: use relative import