[WP] remove French quotes and fix typos

See merge request frama-c/frama-c!3968

Upgrade minimal version of OCaml+ CI

Closes #811

See merge request frama-c/frama-c!3915

David Bühler authored 2 years ago and Allan Blanchard committed 2 years ago

No more exception is needed as /doc/code is no longer used to generate the html
API documentation.

- more recent Nix commit
- update camlp5 for OCaml 4.14
- downgrade menhir for Alt-Ergo 2.2

[build] make install: replaces environment variable INSTALLDIR by PREFIX.

See merge request frama-c/frama-c!3959