These tests are irrevelant on this OS.

Because darwin "normalizes" these filenames differently than Python's NFD
normalization.

data (including local variables caught in the stack trace) alive infinitely.

"%a" instead of "%r"

"%a" instead of "%r"

Add threading.Barrier

than 1.  This matches the pure Python implementation in _pyio and should
fix a couple of failures on the NetBSD buildbot.

xml.sax.saxutils.XMLGenerator as being bound to
http://www.w3.org/XML/1998/namespace.  Patch by Troy J. Farrell.

doc section under frameworks.  Also fixed a couple of markup issues
that affected TOC rendering.

 * Windows always uses mbcs
 * Mac OS X always uses utf-8