[ANN] Improved documentation for Fix

Dear OCaml users,

My last contribution for 2021 is an improved documentation for Fix, a library that helps with various algorithmic constructions that involve memoization, recursion, and numbering.

The documentation can be viewed online.

It can also be viewed locally (on your own machine) as follows:

  opam update
  opam install fix.20211231
  opam install odig
  odig odoc                 # this may take some time
  odig doc fix              # this opens the doc in your browser

Happy fix’in’ in 2022!