anchor.diff:    ]
   
   ----
  +
  +=== 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.
  
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: 
  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`,
  to convert its random tests into OUnit tests that can be part of a wider
  test-suite.
  
  