old_contents: 
  from . import solvers
  from . import minizinc
  from . import aio
  
  __all__ = solvers.__all__ + minizinc.__all__
  
  from .solvers import *
  from .minizinc import *
  
new_contents: 
  from . import solvers
  from . import minizinc
  
  __all__ = solvers.__all__ + minizinc.__all__
  
  from .solvers import *
  from .minizinc import *
  
subject: fix import