Merged revisions 83226-83227,83229-83230,83232 via svnmerge from

Merged revisions 83226-83227,83229-83230,83232 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

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  r83226 | georg.brandl | 2010-07-29 16:17:12 +0200 (Do, 29 Jul 2010) | 1 line

  #1090076: explain the behavior of *vars* in get() better.
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  r83227 | georg.brandl | 2010-07-29 16:23:06 +0200 (Do, 29 Jul 2010) | 1 line

  Use Py_CLEAR().
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  r83229 | georg.brandl | 2010-07-29 16:32:22 +0200 (Do, 29 Jul 2010) | 1 line

  #9407: document configparser.Error.
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  r83230 | georg.brandl | 2010-07-29 16:36:11 +0200 (Do, 29 Jul 2010) | 1 line

  Use correct directive and name.
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  r83232 | georg.brandl | 2010-07-29 16:49:08 +0200 (Do, 29 Jul 2010) | 1 line

  #9388: remove ERA_YEAR which is never defined in the source code.
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