old_contents: from .clusters import ClusterEnsemble
  from .nfw import SurfaceMassDensity
  import cofm
  import halobias
  #from . import *   # noqa
  #__all__ = ["clusters", "nfw", "cofm"]
  
new_contents: from .clusters import ClusterEnsemble  # noqa
  from .nfw import SurfaceMassDensity    # noqa
  import cofm                            # noqa
  import halobias                        # noqa
  
subject: clean up __init__.py