Merged revisions 59202-59211 via svnmerge from

Merged revisions 59202-59211 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r59203 | guido.van.rossum | 2007-11-27 23:38:36 +0100 (Tue, 27 Nov 2007) | 4 lines

  Patch # 1507 by Mark Dickinson.  Make complex(x, -0) retain the sign of
  the imaginary part (as long as it's not complex).
  Backport candidate?
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  r59204 | christian.heimes | 2007-11-28 00:16:44 +0100 (Wed, 28 Nov 2007) | 2 lines

  Expose Py_Py3kWarningFlag as sys.py3kwarning as discussed in #1504
  Also added a warning.warnpy3k() as convenient method for Python 3.x related deprecation warnings.
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  r59206 | christian.heimes | 2007-11-28 00:53:14 +0100 (Wed, 28 Nov 2007) | 1 line

  I forgot to fix one occurence of new in test_descr
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  r59208 | christian.heimes | 2007-11-28 09:02:36 +0100 (Wed, 28 Nov 2007) | 1 line

  Added py3kwarning to the documentation of the sys module.
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