[docs] [issue10461] Use with statement throughout the docs

[SilentGhost]

SilentGhost <michael.mischurow+bpo at gmail.com> added the comment:

patch for Doc/library/logging.rst

Also, note the the change of the mode from `'r'` to `'rb'`. `data_to_send` is further send through socket and therefore requires to be bytes.

I expressed my opinion in irc, but I can repeat here that I think only the most trivial code such as in Doc/library/pipes.rst isn't worth converting.

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Added file: http://bugs.python.org/file19671/logging.rst.diff

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