[issue10461] Use with statement throughout the docs

[Raymond Hettinger]

Raymond Hettinger <rhettinger at users.sourceforge.net> added the comment:

Separate note for Éric:  the try/finally examples do not need to change.  Those are valid python.   Users need to learn both try/finally and the with-statement.

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assignee: docs at python -> rhettinger

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue10461>
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