So it turns out that unittest.makeSuite is used about 100 times
throughout the standard library tests.

More than half the time it can be replaced with
unittest.TestLoader().loadTestsFromTestCase(...)

Some of the other times a loader needs to be constructed and then a
testMethodPrefix of 'Check' set (yuck!).

I'm about halfway through a patch that does this. Think it is worth
continuing or shall I drop it. I don't mind doing it so long as
*someone* thinks it is worthwhile... :-)

(I haven't yet checked for getTestCaseNames but I imagine there will be
a bunch of these to fix as well.)

Another possibility is to move the functions into test_support
(deprecating first) where at least they are out of unittest.