[nukifw]

For the first point, you are right. We start by a common (but very useful) feature. Since OCaml allows an infinite level of nesting (and different kind of structure item) it was still a bit of a challenge, mostly for finding the right UX.

For the second point we delay the aeration convention to the formatter (ocamlformat). It can be configure in a different way :)

Thanks for your feedback!