Merged revisions 60408-60440 via svnmerge from

Merged revisions 60408-60440 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r60425 | raymond.hettinger | 2008-01-29 20:52:09 +0100 (Tue, 29 Jan 2008) | 1 line

  CallMethod is faster with a NULL third-argument than with an empty format string.
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  r60431 | raymond.hettinger | 2008-01-30 01:01:07 +0100 (Wed, 30 Jan 2008) | 1 line

  Add isdisjoint() to the Set/MutableSet ABCs.
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  r60432 | raymond.hettinger | 2008-01-30 01:08:31 +0100 (Wed, 30 Jan 2008) | 1 line

  MutableSets support a remove() method.
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  r60433 | raymond.hettinger | 2008-01-30 01:51:58 +0100 (Wed, 30 Jan 2008) | 1 line

  Demonstrate new except/as syntax.
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  r60440 | christian.heimes | 2008-01-30 12:32:37 +0100 (Wed, 30 Jan 2008) | 1 line

  Patch #1970 by Antoine Pitrou: Speedup unicode whitespace and linebreak detection. The speedup is about 25% for split() (571 / 457 usec) and 35% (175 / 127 usec )for splitlines()
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