Merge: new module annotation `is generated`

This annotation has no effect on the semantic.
is only intended on software engineering software to discriminate computer-generated modules from human-written ones.

Pull-Request: #2366
Reviewed-by: Romain Chanoir <romain.chanoir@viacesi.fr>

diff --cc src/nitrestful.nit
Simple merge

diff --cc tests/sav/nitrestful_args1.res
Simple merge