hswish and hardsigmoid: improve docs

[vkuzo]

Stack from ghstack:

• hswish and hardsigmoid: improve docs #35431 hswish and hardsigmoid: improve docs

Summary:

Resolving @z-a-f's comments on earlier PRs on making
the docblocks easier to read.

Test Plan:

render the new docblocks in http://rst.aaroniles.net/

CI

Reviewers:

Subscribers:

Tasks:

Tags:

Differential Revision: D20658668

[dr-ci]

💊 CircleCI build failures summary and remediations

As of commit 0b6cc8e (more details on the Dr. CI page):

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✅ None of the build failures appear to be your fault 💚

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• 1/1 broken upstream at merge base e3daf70 from Mar 27 until Mar 30 (53 commits; b9adbb5 - 35dbc6e)

  Please rebase on the viable/strict branch (expand for instructions)

  If your commit is newer than viable/strict, you can try basing on an older, stable commit:

  git fetch https://github.com/pytorch/pytorch viable/strict
  git rebase --onto FETCH_HEAD $(git merge-base origin/master HEAD)
  

  If your commit is older than viable/strict:

  git fetch https://github.com/pytorch/pytorch viable/strict
  git rebase FETCH_HEAD
  

  Check out the recency history of this "viable master" tracking branch.

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🚧 1 upstream failure:

These were probably caused by upstream breakages:

• pytorch_linux_backward_compatibility_check_test from Mar 27 until Mar 30 (53 commits; b9adbb5 - 35dbc6e)

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This comment has been revised 5 times.

[z-a-f]

Awesome!

[facebook-github-bot]

This pull request has been merged in b4c4342.