pytorch

52c516ec - [Pytorch Edge] Minor improve documentation in test_backend_with_compiler

[Pytorch Edge] Minor improve documentation in test_backend_with_compiler Summary: Went through all these files and the design doc to understand the to_backend api. Figured I could add some comments to these files to make the apis a little clearer for those that come after. (Note: this ignores all push blocking failures!) Test Plan: na Reviewed By: raziel, larryliu0820 Differential Revision: D34221989 fbshipit-source-id: 699fcbd8714bfb6b58c6c0bf0e5fbc019d2ef6f8 (cherry picked from commit 0b3f5d73e8de216b4402aed2f2b80be8781f145b)