Merged revisions 81568 via svnmerge from

Merged revisions 81568 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/branches/py3k

................
  r81568 | alexander.belopolsky | 2010-05-27 17:42:58 -0400 (Thu, 27 May 2010) | 10 lines

  Merged revisions 81566 via svnmerge from
  svn+ssh://pythondev@svn.python.org/python/trunk

  ........
    r81566 | alexander.belopolsky | 2010-05-27 16:55:27 -0400 (Thu, 27 May 2010) | 3 lines

    Issue #7150: Raise OverflowError if the result of adding or subtracting
    timedelta from date or datetime falls outside of the MINYEAR:MAXYEAR range.
  ........
................