Re-land Parsing file check (#18570)
Summary:
The last time I tried to land it there was a merge race with the docs coverage test lol. Re-landing with the fix.
Re-land of https://github.com/pytorch/pytorch/pull/18304
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18570
Reviewed By: driazati
Differential Revision: D14707285
Pulled By: eellison
fbshipit-source-id: 3a0265928aa8cad78961723d8bf0fbf871fdb71d
