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bpo-29677: DOC: clarify documentation for `round` (#357) 

* DOC: clarify documentation for `round`

Clarified that `round` can take a negative value for *ndigits*.

* DOC: remove trailing whitespace in previous commit

remove trailing whitespace in previous commit
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Gerrit Holl 2017-03-27 23:15:20 +01:00 committed by Victor Stinner
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@ -1262,7 +1262,8 @@ are always available. They are listed here in alphabetical order.
closest multiple of 10 to the power minus *ndigits*; if two multiples are
equally close, rounding is done toward the even choice (so, for example,
both ``round(0.5)`` and ``round(-0.5)`` are ``0``, and ``round(1.5)`` is
``2``). The return value is an integer if called with one argument,
``2``). Any integer value is valid for *ndigits* (positive, zero, or
negative). The return value is an integer if called with one argument,
otherwise of the same type as *number*.
.. note::