bpo-29677: DOC: clarify documentation for round (GH-357) (GH-863)

Mariatta · web-flow · commit 8994f36287b0 · 2017-03-27T17:09:21.000-07:00
(cherry picked from commit 6003db7)
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
@@ -1241,7 +1241,8 @@ 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::
