code: def update_exc(base_exceptions, *addition_dicts):
      
      exc = dict(base_exceptions)
      for additions in addition_dicts:
          for orth, token_attrs in additions.items():
              if not all(isinstance(attr[ORTH], unicode_) for attr in token_attrs):
                  raise ValueError(Errors.E055.format(key=orth, orths=token_attrs))
              described_orth = "".join(attr[ORTH] for attr in token_attrs)
              if orth != described_orth:
                  raise ValueError(Errors.E056.format(key=orth, orths=described_orth))
          exc.update(additions)
      exc = expand_exc(exc, "'", "’")
      return exc
docs: Update and validate tokenizer exceptions. Will overwrite exceptions.
  
      base_exceptions (dict): Base exceptions.
      *addition_dicts (dict): Exceptions to add to the base dict, in order.
      RETURNS (dict): Combined tokenizer exceptions.