Add missing space after -> for topk.values (#42321)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/42321
Signed-off-by: Edward Z. Yang <ezyang@fb.com>
Test Plan: Imported from OSS
Reviewed By: vkuzo
Differential Revision: D22846520
Pulled By: ezyang
fbshipit-source-id: 7c0ab0b019d05a13309c3b8d770582414795799f
