add a param tolerance of cut.py simple

[yunxinmengze]

No description provided.

[csukuangfj]

This PR can be used to fix importing data files from kaldi.

For the yesno example,

you can see from the above screenshot, we need a larger tolerance value, e.g., 0.1.

---

@yunxinmengze

Could you also fix
https://github.com/lhotse-speech/lhotse/blob/master/docs/kaldi.rst

We need to change

lhotse cut simple \
  -r ./data/train_manifests/recordings.jsonl.gz \
  -f ./data/train_manifests/features.jsonl.gz \
  -s ./data/train_manifests/supervisions.jsonl.gz \
  ./yesno_train.jsonl.gz

to

lhotse cut simple \
  -r ./data/train_manifests/recordings.jsonl.gz \
  -f ./data/train_manifests/features.jsonl.gz \
  -s ./data/train_manifests/supervisions.jsonl.gz \
  --tolerance 0.1 \
  ./yesno_train.jsonl.gz

[pzelasko]

Thanks! I'd be fine with setting the default tolerance to 0.1 if you want to make that change as well.

[pzelasko]

@yunxinmengze can you reformat the PR with black and commit again?