old_contents: #!/usr/bin/env python
  """
  Convenience module to use:
  
      python -m behave args...
  
  """
  
  from __future__ import absolute_import
  import sys
  
  if __name__ == "__main__":
      from .main import main
      sys.exit(main())
  
new_contents: #!/usr/bin/env python
  """
  Convenience module to use:
  
      python -m behave args...
  
  """
  
  from __future__ import absolute_import
  import sys
  from .main import main
  
  if __name__ == "__main__":
      sys.exit(main())
  
subject: Tweak for better backward compatibility w/ master repository.