Replaced groups of pushes and pops with indexed access to the stack and
a single adjustment (if needed) to the stacklevel.

Avoids scores of unnecessary increments and decrements to the stackpointer.
Removes unnecessary sequential dependencies so that the compiler has more
freedom for optimizations.  Frees the processor for more parallel and
pipelined execution by using mostly read-only access and having few pointer
adjustments just prior to a read or write.

WARNING:  It would be a minor miracle if the LaTeX stuff still worked.

s/field/member/ generally everywhere, to conform with most other usage in
the docs.

s/daylight savings time/daylight saving time/ generally everywhere,
because the latter spelling is anally correct.

From:
 69.73% of 294 source lines executed in file ./Modules/_codecsmodule.c
 79.47% of 487 source lines executed in file Python/codecs.c
 78.45% of 3643 source lines executed in file Objects/unicodeobject.c

To:
 70.41% of 294 source lines executed in file ./Modules/_codecsmodule.c
 82.75% of 487 source lines executed in file Python/codecs.c
 80.76% of 3638 source lines executed in file Objects/unicodeobject.c

This actually unearthed a bug in the handling of None
values in PyUnicode_EncodeCharmap.

PyUnicode_EncodeDecimal().

is treated as "character maps to <undefined>" and not as
"character mapping must return integer, None or str".

A patch from Andrew Wilkinson to change some bizarre old exec statements
specific to NT and CE.

unreachable now.

into time.  This is little more than *exporting* the datetimetz object
under the name "datetime", and similarly for timetz.  A good implementation
of this change requires more work, but this is fully functional if you
don't stare too hard at the internals (e.g., right now a type named
"datetime" shows up as a base class of the type named "datetime").  The
docs also need extensive revision, not part of this checkin.

(except for Py_DECREF calls) since the introduction of __unicode__.

Always define getenv(), as suggested by Guido. This means that os.getenv() is also defined for MacPython-OS9 (even though it doesn't actually do anything useful), and it shouldn't hurt on other platforms.

Removed the SetDates warning. The warning is in the readme, and the print statement was too obtrusive (it appeared during the installation process, and the user needed to close the resulting window manually).

n the Mac the frozen import that should fail actually succeeds, and we know it, so skip the test in stead of confusing the end user.

Set the limit for the number of open files to 32 if platform==mac.

Made "ascii" the default encoding for MacPython, as suggested by MvL, and ripped out my previous changes to test_unicode. Doing this for 2.3a1 should give people enough time to complain, if they want to, and then we can see whether we want to do anything about it.

This fixes the problem on Windows - that's the only system where I can
test it.

It leaves sys.argv alone and only changes sys.path[0] to an absolute
pathname.

- ossaudiodev.open() raises IOError, not ossaudiodev.error, for cases
  which get mapped to TestSkipped

Typo fix.

whatsnew updates as well.