RFC: ocamlformat the whole code
This is an experimental branch to have a look at the diff and spot things we really don't want ocamlformat to do. We can then find the right option and set it correctly, or we can open an issue/PR on the official repository.
NOTE: this diff was generated with an experimental branch of ocamlformat as per https://github.com/ocaml-ppx/ocamlformat/pull/887