bug#59317: 29.0.50; Feature idea: suppress `message' output in ert batch test output

[Stefan Kangas]

Michael Albinus <michael.albinus@gmx.de> writes:

> Besides the other arguments already given in this thread, I'd like to
> emphasize that messages are useful even in batch mode, for successful
> tests. This is the only way to study ert tests in batch mode, for
> example on our CI/CD machines hydra and emba.

It would be less than useful in CI, indeed.

But in interactive sessions, and when running tests manually with
e.g. M-x compile, it helps to have less noise, to find the relevant
failures faster.

> If messages shall be suppressed, this must be controlled by a user
> option. However, I'm not in favor to do it at all.

Agreed.  Perhaps an environment variable could also be provided, so that
it is easier to control from the command line?