message: Doc review: precaution on contribution [skip ci]
diff: @@ -36,7 +36,12 @@ We use Sphinx to generate the code and you will be able to verify the result in
  ## Something you want to improve in the code
  -Please first take some time to read our [code conventions](code_conventions.md)
  +We don't ask for any paperwork but we expect you don't submit anything you are not allowed to:
  +* check that your work contract and your employer allow you to contribute to this open source project.
  +* insure you do not violate someone's intellectual property.
  +* ...
  +
  +Please, take some time to read our [code conventions](code_conventions.md)
  As a convention, we set a Pull Request as a **Draft Pull Request** when we work on something we want the other contributors to see.
  