Here's the fix for test_bisect.py.

This one has an extra change, that of replacing the manual method of obtaining c_bisect and py_bisect with two calls to support.import_fresh_module.

This one also has an extra wrench thrown in the gears by including a few doctests.  I haven't changed anything in relation to those doctests, but I wonder if there's really any point to keeping them there considering they claim to be pulled from the docs but are in fact significantly different from what is in the docs these days.