[Python-3000] PEP 3131 accepted

["Martin v. Löwis"]

> I just realized that this is not the whole story.  There's no
> requirement that a combining character has to actually come
> after a character it can be combined with.  So there might be
> valid identifiers containing sequences of characters that don't
> have a sensible rendering, or that force the combining comma to
> appear separately and thus indistinguishable from a quotation
> mark even in a Unicode-aware editor.

That can't happen. In Unicode, there is no notion of "can be combined
with": any base character can be combined with any combining character.
The rendering engine is supposed to create a glyph on the fly.

Regards,
Martin