Ian Moody <moz-ian@perix.co.uk> [Fri, 04 Oct 2019 19:36:21 +0100] rev 43191
py3: fix test-bad-extension expectations for py35
ModuleNotFoundError was introduced in 3.6, so the tests need to expect to see
ImportError with 3.5.
Differential Revision: https://phab.mercurial-scm.org/D7063