latest SwiftFormat not matching the current formatting

[weissi]

Unfortunately, there's a real issue with using SwiftFormat in an automated way: SwiftFormat seems to randomly change its default formatting.

That means that to pass the AHC CI you'll need to install the very SwiftFormat version that is in use here.

And even updating SwiftFormat in AHC's CI isn't really going to fix the issue because that will needlessly reformat the whole source, obliterating git blame :(.

We need a proper solution here.