Merged revisions 70678 via svnmerge from

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

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  r70678 | mark.dickinson | 2009-03-29 15:37:51 +0100 (Sun, 29 Mar 2009) | 3 lines

  Issue #532631: Replace confusing fabs(x)/1e25 >= 1e25 test
  with fabs(x) >= 1e50, and fix documentation.
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