[FX][2/2] Make docstrings pretty when rendered (#48871)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/48871
Test Plan: Imported from OSS
Reviewed By: ansley
Differential Revision: D25351588
Pulled By: jamesr66a
fbshipit-source-id: 4c6fd341100594c204a35d6a3aab756e3e22297b
