losetup --all --verbose results in usage

[Bernhard Voelker <mail@bernhard-voelker.de>]

I was surprised that running
	mount/losetup --all --verbose
results in usage().

As -a is the option to list all used loop devices,
one might think that -v adds some more info to the output.

Neither --help nor the man pages nor the info page tells
that -a doesn't accept other options:

mount/lomount.c (line 1133):

         } else if (all) {
                 if (argc > 2)
                         usage(stderr);

Should we work on this?
If it's not possible to output more information with
-v, then it would maybe make sense to ignore it, right?

Have a nice day,
Berny