[docs] Add a version switcher to python docs site (issue 16331)

[yselivanov.ml at gmail.com]

http://bugs.python.org/review/16331/diff/6400/Doc/tools/sphinxext/layout.html
File Doc/tools/sphinxext/layout.html (right):

http://bugs.python.org/review/16331/diff/6400/Doc/tools/sphinxext/layout.html#newcode7
Doc/tools/sphinxext/layout.html:7: <span id="version_switcher">{{
release }}</span>
On 2012/10/26 19:48:52, ezio.melotti wrote:
> This should probably be wrapped in an {% if not embedded %}

Well, in the current patch it shouldn't be, as {{ shorttitle }} will
just display 'Documentation', and the <span> will display a release
number.  Together they look like they looked before the patch...

http://bugs.python.org/review/16331/