Docs: style: multiline brackets

[beauxq]

What is this fixing or adding?

This can be debated/disagreed with - it's just something I thought of when I saw an inconsistency within a single PR.

This is compatible with PEP8

But PEP8 also allows other things, like:

stuff = {
    x: y
    for x, y in thing
    if y > 2}

and

stuff = {
    x: y
    for x, y in thing
    if y > 2
    }

Note that this only applies to when the open bracket is at the end of a line.
So this is still ok:

stuff = {x: y
         for x, y in thing
         if y > 2}

How was this tested?

sometimes

[black-sliver]

Hm, there have been expressions/comprehensions/generators where the first counter example looks better to me, but generally speaking I agree that

{
    ...
}

is the nicest syntax when you span more than 3-ish lines