[DRE-maint] Bug#923986: ruby-pygments.rb: FTBFS randomly (failing tests)

[Santiago Vila]

> >  export GEM2DEB_TEST_RUNNER = --check-dependencies
> > +export MENTOS_TIMEOUT = 60
> 
> I like adding a comment explaining why this is needed; it can be just a
> very brief phrase + a link to this bug.

Ok, how about this?

# The default is 8 seconds but it's not always enough for the test suite.
# See #923986 for details.

Thanks.