drothlis/stb-tester — pull request #99 by LewisHaley (2014-02-14 13:47:06+00:00)
Title: stbt.as_precondition: preserve screenshot from intercepted failures

Just because the error comes from inside the `as_precondition` context,
to be marked as a "less interesting" failure, doesn't mean that there's
no value in keeping the screenshot from the intercepted Exception.