Merged revisions 74865,75175,75180 via svnmerge from

Merged revisions 74865,75175,75180 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r74865 | georg.brandl | 2009-09-17 02:49:37 -0500 (Thu, 17 Sep 2009) | 1 line

  #6912: add "with" block support to pindent.
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  r75175 | georg.brandl | 2009-10-01 15:11:14 -0500 (Thu, 01 Oct 2009) | 1 line

  Fix some weird whitespace and two other overlong lines.
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  r75180 | georg.brandl | 2009-10-01 15:59:31 -0500 (Thu, 01 Oct 2009) | 1 line

  #7031: Add TestCase.assertIsInstance and negated method.
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