[docs] [issue11643] Use |version| instead of X.Y in the doc

[Ezio Melotti]

Ezio Melotti added the comment:

I fixed the one in site.py.
If there's no way to use |version| in :file:`...` I think using {X.Y} is OK, so that can be done where a bare X.Y (without {}) is currently used.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue11643>
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