Resolve "Allows empty action in grammar but raise validation warning/error"
requested to merge 154-allows-empty-action-in-grammar-but-raise-validation-warning-error into master
[A venir] Mise en place de quotas sur nos instances GitLab. Plus d'information sur : https://doc-si.inria.fr/pages/viewpage.action?pageId=129728565
[Coming soon] Quotas installation on our GitLab instances. More information: https://doc-si.inria.fr/pages/viewpage.action?pageId=129728565