[PATCH 3/3] test: suppress diff for broken test without V=1

[David Bremner]

Jani Nikula <jani at nikula.org> writes:

> Known broken tests are, well, known broken. Do not print the result
> diff for them unless V=1 is specified. Now that the test description
> is printed also when known broken tests fail, the user can also skip
> to running the individual failing tests.

pushed remained of series to master

d