Merged revisions 73379,73388,73507,73722 via svnmerge from

Merged revisions 73379,73388,73507,73722 via svnmerge from
svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3

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  r73379 | benjamin.peterson | 2009-06-11 18:06:21 -0500 (Thu, 11 Jun 2009) | 1 line

  use a real conditional expresion
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  r73388 | benjamin.peterson | 2009-06-12 09:44:29 -0500 (Fri, 12 Jun 2009) | 1 line

  fix typo in last fix
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  r73507 | benjamin.peterson | 2009-06-22 13:32:04 -0500 (Mon, 22 Jun 2009) | 1 line

  remove svn:executable property
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  r73722 | benjamin.peterson | 2009-06-30 19:44:30 -0500 (Tue, 30 Jun 2009) | 1 line

  replace fail* with assert*
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