[issue12043] Update shutil documentation

[Sandro Tosi]

Sandro Tosi <sandro.tosi at gmail.com> added the comment:

It turns out it was just move() with a slightly outdated description; so I take the occasion to fix some minor stuff in the doc.

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keywords: +patch
stage: needs patch -> patch review
Added file: http://bugs.python.org/file22548/issue12043-default.patch

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