[WIP][CheatSheet] update out of place ops, update act fn, optimzers, schedulers, samplers

[ptrblck]

Added some update to out-of-place tensor operations as well as some updates to

• activation functions
• optimizers
• schedulers
• samplers

CC @jspisak

Let me know, if these changes look OK and I can add them to the PyTorch Cheat.md.
Tagging this PR as WIP for now.

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[jspisak]

thanks @ptrblck! It had been well over a year since we put together the first cheatsheet so this is a great refresh.

cc @jlin27 - do you know why netlify is failing? for this one, i dont think we necessarily need it but it seems to be generally down.. :(

[ptrblck]

Could it be failing, because I would need to add the same changes to this file: https://github.com/pytorch/tutorials/blob/master/beginner_source/PyTorch%20Cheat.md ?

[ptrblck]

If the changes look OK, I'll add the same diffs to the other mentioned file later tonight.

[jspisak]

yes, we should actually be updating the .md file. Thanks!

[jlin27]

Let me look into the Netlify builds. I cleared the cache and rebuild which usually clears it up.

Thanks @ptrblck for these updates!
Do either of you know why there are two cheatsheet files - PyTorch Cheat.md and ptcheat.rst? Currently the index.rst links to the one generated from the rst file - beginner/ptcheat.html but if we should use the .md one instead, I can update it in the index.rst.

[ptrblck]

@jlin27 Thanks for looking into it!
I'm not sure why there are two files, but I saw that both seem to have commits.
I've just updated one file and can update the other one in a follow-up PR, if necessary.

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