Fix docstring in Unflatten (#41835)
Summary:
I'd like to amend the docstring introduced in https://github.com/pytorch/pytorch/issues/41564. It's not rendering correctly on the web, and this should fix it.
cc albanD
Pull Request resolved: https://github.com/pytorch/pytorch/pull/41835
Reviewed By: izdeby
Differential Revision: D22672368
Pulled By: albanD
fbshipit-source-id: f0b03c2b2a4c79b790d54f7c8f2ae28ef9d76a75
