Re: [PATCH v2 1/3] t/unit-tests: update clar to 39f11fe

Jeff King [off-list ref] writes:

quoted

The alternative would be to make this `cl_fail(...)` instead, but to the
best of my knowledge this isn't even a valid construct.

It is valid; that's how we define BUG(), for example.

Thanks.  I was wondering how that thing was working after seeing
Patrick's message ;-).

There are other options like GNU's "## __VA_ARGS__", but I think eating
the format argument with the "..." is the only portable way, at least
for standard versions we'd support. I think C23 added __VA_OPT__.

-Peff