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bpo-37134: Use PEP570 syntax for sum() (GH-13851) 

(cherry picked from commit c4c421d619)

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
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Miss Islington (bot) 2019-06-05 16:21:08 -07:00 committed by GitHub
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Doc/library/functions.rst
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@ -1562,11 +1562,11 @@ are always available. They are listed here in alphabetical order.
about strings, see :ref:`textseq`.
.. function:: sum(iterable[, start])
.. function:: sum(iterable, /, start=0)
Sums *start* and the items of an *iterable* from left to right and returns the
total. *start* defaults to ``0``. The *iterable*'s items are normally numbers,
and the start value is not allowed to be a string.
total. The *iterable*'s items are normally numbers, and the start value is not
allowed to be a string.
For some use cases, there are good alternatives to :func:`sum`.
The preferred, fast way to concatenate a sequence of strings is by calling