GitLab

Summary:
- fix retrieve PR script to handle commits with unrecognized/invalid PR numbers, such as in 7b6b2d00
- add modifications similar to pytorch's [#71917](https://github.com/pytorch/pytorch/pull/71917), [#72085](https://github.com/pytorch/pytorch/pull/72085)

Pull Request resolved: https://github.com/pytorch/audio/pull/2249

Reviewed By: nateanl, mthrok

Differential Revision: D34304210

Pulled By: carolineechen

fbshipit-source-id: 245784219317e355b5cece4a139dee71d65bfdd1

Summary:
Pull Request resolved: https://github.com/pytorch/audio/pull/2096

run: `arc lint --apply-patches --paths-cmd 'hg files -I "./**/*.py"'`

Reviewed By: mthrok

Differential Revision: D33297351

fbshipit-source-id: 7bf5956edf0717c5ca90219f72414ff4eeaf5aa8

Co-authored-by: Facebook Community Bot <6422482+facebook-github-bot@users.noreply.github.com>