[docs] [issue12666] map semantic change not documented in What's New

[Jason R. Coombs]

Jason R. Coombs <jaraco at jaraco.com> added the comment:

I'm not sure how the bugtracker patch mechanism works, but the patch it produced included a lot of changes that I didn't make (changesets already committed to the master repo).

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keywords:  -patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12666>
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