Improve formatting

[BenjaminBrienen]

Objective

Format the code optimally. This helps avoid conflicts and unnecessary changes.

For example, when trying to use Find & Replace to make code changes, formatting everything on 1 line makes it simpler. After the Find & Replace operations, formatting can be returned back to normal. This is what I did in #16112.

Solution

1. In rustfmt.toml set max_width = 9999.
2. Run cargo fmt --all.
3. Remove max_width. (sets it back to 100)
4. Run cargo fmt --all.

I consider this to be a workaround to a bug in rustfmt where the resulting formatted code depends on how it was formatted beforehand.

Testing

CI

[mockersf]

I would prefer this to be blocked until after the 0.15 is released, as it has high chances of conflicts during cherry picks.

[IceSentry]

This turns lines that were already above 100 to be even longer. I don't see this as a win at all. Especially the one with long strings that put all the parameters on the same already way too long line.

I'm pretty sure a bunch of those are bugs in rustfmt where it just gives up when lines are super long because of a string.