anchor.diff:  
   http://ounit.forge.ocamlcore.org/[OUnit] is a popular unit-testing framework
   for OCaml.
  -QCheck provides a sub-library `qcheck.ounit` with some helpers, in `QCheck_ounit`,
  +QCheck provides a sub-library `qcheck-ounit` with some helpers, in `QCheck_ounit`,
   to convert its random tests into OUnit tests that can be part of a wider
   test-suite.
   
  
positive.code: 
  ----
  
  === Integration with alcotest
  
  https://github.com/mirage/alcotest/[Alcotest] is a simple and colorful test framework for
  OCaml. QCheck now provides a sub-library `qcheck-alcotest` to
  
negative.code:   ]
  
  ----
  
  === Compatibility notes
  
  Starting with 0.9, the library is split into several components:
  
  - `qcheck-core` depends only on unix and bytes. It contains the module
    `QCheck` and a `QCheck_base_runner` module with our custom runners.
  - `qcheck-ounit` provides an integration layer for `OUnit`
  - `qcheck` provides a compatibility API with older versions of qcheck,
    using both `qcheck-core` and `qcheck-ounit`.
    It provides `QCheck_runner` which is similar to older versions and contains
    both custom and Ounit-based runners.
  - `qcheck-alcotest` provides an integration layer with `alcotest`
  
  Normally, for contributors,
  `opam pin https://github.com/c-cube/qcheck` will pin all these packages.
  