[issue7447] Sum() doc and behavior mismatch

[Leonhard Vogt]

Leonhard Vogt <leonhard.vogt at gmx.ch> added the comment:

I changed the documentation regarding string not allowed as start argument and performance

I included the list concatenation with itertools.chain from
http://groups.google.com/group/comp.lang.python/msg/33e764d0ac41826a

patch is based on revision 81300 in py3k branch.

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keywords: +patch
nosy: +lvogt
Added file: http://bugs.python.org/file17390/functions.rst.patch

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