[opam-devel] Some Rendering Improvements

[David Sheets]

I've made some improvements to rendering constraint formulae and
calculating reverse dependency constraints. The new rendering takes a
little more space (except for the duplication that has been removed)
but is, imnsho, far easier to read and navigate.

I'm interested in your feedback on this development. You'll need the
master branch of opam-lib and opamfu and my opamfu branch of opam2web.
You can find the relevant PR at
<https://github.com/ocaml/opam2web/pull/81>.

Thanks,

David