[issue15569] Doc doc: incorrect description of some roles as format-only

[Ezio Melotti]

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


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type:  -> enhancement
versions: +Python 2.7, Python 3.2, Python 3.3, Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15569>
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