Ezio Melotti <ezio.melo...@gmail.com> added the comment:

Technically you are correct, however using zero-width classes inside a 
lookbehind doesn't make much sense, because the result would be equivalent even 
without lookbehind.
I replaced 'never' with 'not', because usually it will not match, except in 
these corner cases that can IMHO be ignored.

----------
assignee: docs@python -> ezio.melotti
resolution:  -> fixed
stage:  -> committed/rejected
status: open -> closed
type:  -> enhancement
versions: +Python 2.7, Python 3.3

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue14461>
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