for bug report and patch.

pymath.c to Modules/_math.c.

Thanks Case Van Horsen for the patch.

use new-style formatting.  Thanks Florent Xicluna for the patch.

self-test.  Because of a change to the way tracebacks are printed,
this self-test was failing.  The test is run (and passes) during normal
regression testing.  So instead of running the failing self-test this
patch makes doctest emit a usage message.  This is better behavior anyway
since passing in arguments is the real reason to run doctest as a command.

Bug discovery and initial patch by Florent Xicluna.

it to do the conversion explicitly instead.  See issue #7550.

Refactored HTTPHandler tests and added testcase for proxy authorization.

math module.