docs: def compare_hives(fs0, fs1):
      """Compares all the windows registry hive files
      returning those which differ.
  
      """
      registries = []
  
      for path in chain(registries_path(fs0.fsroot), user_registries(fs0, fs1)):
          if fs0.checksum(path) != fs1.checksum(path):
              registries.append(path)
  
      return registries