Merged revisions 68546 via svnmerge from

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

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  r68546 | raymond.hettinger | 2009-01-12 04:37:32 -0600 (Mon, 12 Jan 2009) | 1 line

  Optimize heapq.nsmallest/nlargest for cases where n==1 or n>=size.
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