PEP 630: Format and copyedit prior to conversion into a docs HOWTO guide

[CAM-Gerlach]

As originally requested by @encukou in #2450 .

Overall, the base prose quality of the document was very good, so there weren't that many changes necessary to begin with, without doing a major rewrite (when there are certainly bigger fish to fry in that department).

In general, I attempted to keep my changes fairly unobtrusive. There were only a few non-purely-copyediting additions that affect content/meaning, the only really significant was was adding a mention of PEP 683 (PEP-0683), which relates directly to the note on immutable objects not being truly immutable due to the refcount.

[encukou]

Thank you!
If you don't mind me asking, what's the main thing you'd change for a major rewrite?

[CAM-Gerlach]

Updating to retrigger the CLA bot

If you don't mind me asking, what's the main thing you'd change for a major rewrite?

Sorry, I meant to reply to this but must have never submitted it, and its been so long I've forgotten what I was going to say other than restructuring it to be framed more as a guide, which would presumably be done when it is moved.

[CAM-Gerlach]

@encukou can we merge this, or anything else you'd like to change at this point?

[CAM-Gerlach]

Hey @encukou , any final thoughts on this one?

[encukou]

anything else you'd like to change at this point?

Well, the restructuring you mentioned :)
But that can definitely be done later. With PEP 687 submitted to the SC, it's not a good time for restructuring.

Thank you for the editing!

[CAM-Gerlach]

Thank you for your kind words and encouraging me to!