[docs] [issue12617] Mutable Sequence Type can work not only with iterable in slice[i:j] = t

[Ezio Melotti]

Changes by Ezio Melotti <ezio.melotti at gmail.com>:


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nosy: +ezio.melotti

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12617>
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