=act #3725 Make FSMTimingSpec more robust.
=doc #3782 Make IODocSpec say what went wrong
Merge pull request #1885 from akka/wip-3725-make-fsmtimingspec-more-robust-ban

=act #3725 Make FSMTimingSpec more robust.
Merge pull request #1895 from akka/wip-3782-make-iodocspec-say-what-went-wrong-ban

=doc #3782 Make IODocSpec say what went wrong
Merge remote-tracking branch: upstream/master