Fixed a formatting issue in doc comments (#17505)
Summary:
for torch.distributed.broadcast_multigpu per issue #17243
Pull Request resolved: https://github.com/pytorch/pytorch/pull/17505
Reviewed By: janewangfb
Differential Revision: D14373865
Pulled By: pietern
fbshipit-source-id: 6d7e91a3da50a7c9ba417ad852f7746eb5200043
