[issue5350] Modification to "pairwise" in itertools recipes

[Georg Brandl]

Georg Brandl <georg at python.org> added the comment:

Assigning to Raymond.

Note that "for elem in b: break" and "next(b)" are not equivalent when b
is empty/exhausted.

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assignee: georg.brandl -> rhettinger
nosy: +rhettinger

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<http://bugs.python.org/issue5350>
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