Merged revisions 85450-85455,85460-85465 via svnmerge from

Merged revisions 85450-85455,85460-85465 via svnmerge from
svn+ssh://svn.python.org/python/branches/py3k

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  r85450 | georg.brandl | 2010-10-14 08:35:53 +0200 (Do, 14 Okt 2010) | 1 line

  #7642: update to os.system() docs.
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  r85451 | georg.brandl | 2010-10-14 08:41:42 +0200 (Do, 14 Okt 2010) | 1 line

  #3865: add note about benchmarking with profilers, and move licensing stuff to bottom of document.
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  r85452 | georg.brandl | 2010-10-14 08:43:22 +0200 (Do, 14 Okt 2010) | 1 line

  #10046: small correction to atexit docs.
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  r85453 | georg.brandl | 2010-10-14 08:46:08 +0200 (Do, 14 Okt 2010) | 1 line

  #6825: small correction to split() docs.
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  r85454 | georg.brandl | 2010-10-14 08:48:47 +0200 (Do, 14 Okt 2010) | 1 line

  Mention 2to3.
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  r85455 | georg.brandl | 2010-10-14 08:59:45 +0200 (Do, 14 Okt 2010) | 1 line

  #1710703: write zipfile structures also in the case of closing a new, but empty, archive.
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  r85460 | georg.brandl | 2010-10-14 09:24:28 +0200 (Do, 14 Okt 2010) | 1 line

  #9964: fix running test_import under -O or -OO.
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  r85461 | georg.brandl | 2010-10-14 09:29:08 +0200 (Do, 14 Okt 2010) | 1 line

  #9964: fix lib2to3 fixer fix_operator when running under -OO.
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  r85462 | georg.brandl | 2010-10-14 09:32:52 +0200 (Do, 14 Okt 2010) | 1 line

  #9964: fix running test_xml_etree under -OO.
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  r85463 | georg.brandl | 2010-10-14 09:34:56 +0200 (Do, 14 Okt 2010) | 1 line

  Better check for "any optimize option given".
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  r85464 | georg.brandl | 2010-10-14 09:42:27 +0200 (Do, 14 Okt 2010) | 1 line

  #9964: fix running test_compileall under -O and -OO.
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  r85465 | georg.brandl | 2010-10-14 10:08:56 +0200 (Do, 14 Okt 2010) | 1 line

  #9964: fix running test_cmd_line_script under -O and -OO.
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