[docs] [issue13997] Clearly explain the bare minimum Python 3 users should know about Unicode

[Nick Coghlan]

Changes by Nick Coghlan <ncoghlan at gmail.com>:


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assignee:  -> docs at python
components: +Documentation
nosy: +docs at python
title: Add open_ascii() builtin -> Clearly explain the bare minimum Python 3 users should know about Unicode
versions: +Python 3.2, Python 3.3

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue13997>
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