old_contents: """River Avulsion Module."""
  
  from .riverbmi import BmiRiverModule
  from .rivermodule import RiverModule
  
  
  __all__ = ['BmiRiverModule', 'RiverModule']
  
new_contents: """River Avulsion Module."""
  
  from .riverbmi import BmiRiverModule
  from .rivermodule import rivermodule
  
  
  __all__ = ['BmiRiverModule', 'rivermodule']
  
subject: Rename package from avulsion to rafem.