[issue2719] Backport next()

[Raymond Hettinger]

Raymond Hettinger <rhettinger at users.sourceforge.net> added the comment:

ISTM, the only value added by next(g) is that it replaces g.next() with 
a more conventional spelling, g.__next__().  Since 2.6 still has g.next
(),I don't see how this backport adds value.  It does however create a 
second way to do it that will be confusing to some remaining in the 2.x 
world.  I think we should avoid double spellings in 2.6 except in cases 
where the 2-to-3 converter would need help.

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nosy: +rhettinger

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