old_contents: from .core import unify, reify
  from .more import unifiable
  from .variable import var, isvar, vars, variables, Var
  
  __version__ = '0.2.1'
  
new_contents: from .core import unify, reify
  from .more import unifiable
  from .variable import var, isvar, vars, variables, Var
  
  __version__ = '0.2.2'
  
subject: Bump version to reflect fix in packaging structure