fix eng word space (#598)

chenmengzheAAA

2023-06-06 12e1849c6ddc228d6f62dedc7f95c22038498236

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beam_size: 5
penalty: 0.0
maxlenratio: 0.0
minlenratio: 0.0
ctc_weight: 0.5
lm_weight: 0.7