are actually getting generated.  Add helpered method
ensure_opcode_in_pickle to do a correct job checking for that.  Changed
test_long1(), test_long4(), and test_short_tuples() to use it.

readability.

load_bool():  Now that I know the intended difference between _PUSH and
_APPEND, used the right one.

Pdata_grow():  Squashed out a redundant overflow test.

wasn't used outside the assert (and hence caused a compiler warning
about an unused variable in NDEBUG mode).  The assert wasn't very
useful any more.

_PyLong_NumBits(): moved the calculation of ndigits after asserting
that v != NULL.

huge.  On older Linux systems, the C library's strtod() apparently
gives up before seeing the end of the string when it sees so many
digits that it thinks the result must be Infinity.  (It is wrong, BTW
-- there could be an "e-10000" hiding behind 10,000 digits.)  The
shorter shuge still tests what it's testing, without relying on
strtod() doing a super job.

exception, ResourceDenied.  This is used to distinguish between tests that
are skipped for other reasons (platform support, missing data, etc.) from
those that are skipped because a "resource" has not been enabled.  This
prevents those tests from being reported as unexpected skips for the
platform; those should only be considered unexpected skips if the resource
were enabled.

Rename 'whitespace' global to '_whitespace' -- it's not part of the
public interface.

that are no real tests, because test_b1 and
test_b2 no longer exist. (Spotted by Raymond Hettinger)

[ 676342 ] after using pdb readline does not work correctly

using Michael Stone's patch so the completer functionality of
cmd is only setup between preloop and postloop.

* Correct description of PyFloat_FromString.  While ignored, the pend
  argument still has to be given.
* Typo in PyLong_FromString.

description since while there, it is useless and ignored, according to Tim's
commen.  (PyInt_FromString is also not described, but PyLong_FromString is.
Is the former deprecated?)

cross-pickling tests.

overflow holes in Pdata_grow().

a function, then

    p->f(arg1, arg2, ...)

is semantically the same as

    (*p->f)(arg1, arg2, ...)

Changed all instances of the latter into the former.  Given how often
the code embeds this kind of expression in an if test, the unnecessary
parens and dereferening operator were a real drag on readability.

embedded assignments, for readability.

needed outside the first loop.

loops.  Renamed DATA and BINDATA to DATA0 and DATA1.  Included
disassemblies, but noted why we can't test them.  Added XXX comment to
cPickle about a mysterious comment, where pickle and cPickle diverge
in how they number PUT indices.