[docs] [issue18562] Regex howto: revision pass

[Roundup Robot]

Roundup Robot added the comment:

New changeset 366ca21600c9 by Andrew Kuchling in branch '3.3':
#18562: various revisions to the regex howto for 3.x
http://hg.python.org/cpython/rev/366ca21600c9

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nosy: +python-dev

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<http://bugs.python.org/issue18562>
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