...only when running under minimal/do, of course.
The tests in question mostly fail because they're testing particular
dependency-related behaviour, and minimal/do doesn't support dependencies,
so naturally it doesn't work.
Unfortunately it failed before the previous patch, so that's why this test
is needed :(
The test is a little ugly, because the bug I'm testing for didn't happen
except if you ran 'redo' two times in a row, not two times inside the same
redo session. That's because dependency caching inside the one session
prevents the accidental rebuild.
