Merged revisions 74838-74839 via svnmerge from

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

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  r74838 | georg.brandl | 2009-09-16 18:22:12 +0200 (Mi, 16 Sep 2009) | 1 line

  Remove some more boilerplate from the actual tests in test_pdb.
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  r74839 | georg.brandl | 2009-09-16 18:36:39 +0200 (Mi, 16 Sep 2009) | 1 line

  Make the pdb displayhook compatible with the standard displayhook: do not print Nones. Add a test for that.
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