fix single word case (#1679)

彭震东

2024-04-29 1f49a4f2b2744c30fcbfff6fbb85d6133c6203f2

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from abc import ABC
from abc import abstractmethod
from typing import Iterator
 
 
class AbsIterFactory(ABC):
    @abstractmethod
    def build_iter(self, epoch: int, shuffle: bool = None) -> Iterator:
        raise NotImplementedError