[docs] [issue1446619] extended slice behavior inconsistent with docs

[Fumihiro Bessho]

Fumihiro Bessho added the comment:

I also wondered the same thing today and found this issue.

I've added my comment on the patch to make the change more precise. Can anyone move it ahead and update the document?

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nosy: +bessho

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue1446619>
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