fix hotword tokenize

haoneng.lhn

2023-07-17 52b36291e1a6bdac7f7f067b9e28e79b24de4c62

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p m    p.m.
pm    p.m.
p.m.
p.m    p.m.
am    a.m.
a.m.
a.m    a.m.
a m    a.m.