      augmenter: Optional[Callable] = None,
  ) -> Callable[["Language"], Iterable[Example]]:
      return Corpus(
          path,
          gold_preproc=gold_preproc,
          max_length=max_length,
 
</s> remove     path: Path,
 </s> add     path: Optional[Path], </s> remove train = ""
dev = ""
 </s> add train = null
dev = null </s> remove train = ""
dev = ""
 </s> add train = null
dev = null </s> remove train = ""
dev = ""
 </s> add train = null
dev = null
    if path is None:
        raise ValueError(Errors.E913)
      augmenter: Optional[Callable] = None,
  ) -> Callable[["Language"], Iterable[Example]]:
    if path is None:
        raise ValueError(Errors.E913)
      return Corpus(
          path,
          gold_preproc=gold_preproc,
          max_length=max_length,
keep add keep keep keep keep
 Make corpus paths default to None and improve errors 
spacy/training/corpus.py