fix eng word space (#598)

chenmengzheAAA

2023-06-06 12e1849c6ddc228d6f62dedc7f95c22038498236

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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