Merged revisions 73940 via svnmerge from

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

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  r73940 | georg.brandl | 2009-07-11 12:37:38 +0200 (Sa, 11 Jul 2009) | 1 line

  #6430: add note about size of "u" type.
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