Merged revisions 80441 via svnmerge from

Merged revisions 80441 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r80441 | brian.curtin | 2010-04-24 11:19:22 -0500 (Sat, 24 Apr 2010) | 13 lines

  Merged revisions 80439 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

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    r80439 | brian.curtin | 2010-04-24 10:40:11 -0500 (Sat, 24 Apr 2010) | 6 lines

    Fix #7838. Add docstrings and privatize _subprocess implementation details.

    Since CREATE_NEW_* are used for the creation flags of a subprocess, they
    were added to __all__. The rest of the previously exposed attributes are
    now qualified by _subprocess.ATTR rather than importing *.
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