[issue6801] symmetric_difference_update documentation fix

[Georg Brandl]

Georg Brandl <georg at python.org> added the comment:

Oops, that was a bit uncoordinated :)

I saw the new bug report in my inbox, and decided to look at what might
be wrong despite the somewhat meager description, and already saw the
"fixed" version and fixed it again.

Anyway. I think the unfixed, and now reverted, version is the better
one, first because the description talks about "either" and "both"
implying only two sets participating, and second because the method form
also supports only one argument, indicating that the case of multiple
sets or'ed together as the second operand of ^ is not a common one.

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resolution: fixed -> wont fix
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue6801>
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