Reorder torch.distributed.rpc.init_rpc docstring arguments (#50419)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/50419
Test Plan: Imported from OSS
Reviewed By: glaringlee
Differential Revision: D25911561
Pulled By: pbelevich
fbshipit-source-id: 62c9a5c3f5ec5eddcbd149821ebdf484ff392158
