Merged revisions 72491-72493 via svnmerge from

Merged revisions 72491-72493 via svnmerge from
svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3

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  r72491 | benjamin.peterson | 2009-05-08 19:33:27 -0500 (Fri, 08 May 2009) | 7 lines

  make 2to3 use unicode internally on 2.x

  This started out as a fix for #2660, but became this large refactoring
  when I realized the dire state this was in. 2to3 now uses
  tokenize.detect_encoding to decode the files correctly into unicode.
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  r72492 | benjamin.peterson | 2009-05-08 19:35:38 -0500 (Fri, 08 May 2009) | 1 line

  remove compat code
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  r72493 | benjamin.peterson | 2009-05-08 19:54:15 -0500 (Fri, 08 May 2009) | 1 line

  add a test for \r\n newlines
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