[docs] [issue18758] Fix internal references in the documentation

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Yes. I have 180 Kb patch which touches 107 files, and this is yet too large for one issue. I will continue split this patch for lesser issues.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18758>
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