Print keyword-only arg symbol for function signature suggestions. (#36780)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/36780
Fixes: https://github.com/pytorch/pytorch/issues/36773
Test Plan: Imported from OSS
Differential Revision: D21081993
Pulled By: gchanan
fbshipit-source-id: 624b0077f88208aafa131ab7b3e5f1fe9dd70987
