[docs] [issue17040] Document context manager support for shelf objects

[Ezio Melotti]

Ezio Melotti added the comment:

Fixed, thanks for the report and the patch!

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assignee: docs at python -> ezio.melotti
nosy: +ezio.melotti
resolution:  -> fixed
stage:  -> committed/rejected
status: open -> closed
type:  -> enhancement

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17040>
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