Merged revisions 74366 via svnmerge from

svn+ssh://svn.python.org/python/branches/py3k

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  r74366 | georg.brandl | 2009-08-13 09:50:57 +0200 (Do, 13 Aug 2009) | 1 line

  #6126: fix pdb stepping and breakpoints by giving the executed code the correct filename; this used execfile() in 2.x which did this automatically.
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