assertNotRegexpMatches -> assertNotRegex?

[jvanasco]

Python 3.5 deprecated assertNotRegexpMatches in favor of assertNotRegex ( see https://docs.python.org/3/library/unittest.html#unittest.TestCase.assertNotRegex ).

Looking at the history of releases, it seems like it was omitted from the initial deprecation as a mistake then backported

• bpo-30335: Add deprecation alias entry for assertNotRegexpMatches python/cpython#1536
• https://bugs.python.org/issue30335

Right now assertNotRegexpMatches works in both Py2 and Py3, but that is scheduled to change. Any chance six can have a assertNotRegex sooner than later?