Run clang-format

This MR is better read commit per commit.

The first four commits fix some problematic code, to work properly after clang-format, while the fifth one is the actual run.

The fifth commit is easy to run again, so maybe we’d want to merge the first four first, merge a bunch of other MRs to avoid having to run them again after that, and then re-run clang-format and make the CI enforce it afterwards.

I’d also like to make the CI enforce that all commits pass the clang-format check, but I’m not too sure how to go with that without it being too annoying to contributors, this is open to discussion, with no change for now.