Merged revisions 70975 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

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  r70975 | brett.cannon | 2009-04-01 12:57:10 -0700 (Wed, 01 Apr 2009) | 4 lines

  test_logging was blindly clearing the warnings filter. This caused
  PendingDeprecationWarnings to be spewed all over by unittest.failIf*(). Fix
  moves over to using warnings.catch_warning to protect the warnings filter.
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