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Indicate that abs() method accept argument that implement __abs__(), just like call() method in the docs (GH-20509) 

(cherry picked from commit 2831642212)

Co-authored-by: Windson yang <wiwindson@outlook.com>
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Miss Islington (bot) 2020-05-29 04:42:40 -07:00 committed by GitHub
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Doc/library/functions.rst
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@ -43,9 +43,8 @@ are always available. They are listed here in alphabetical order.
.. function:: abs(x)
Return the absolute value of a number. The argument may be an
integer or a floating point number. If the argument is a complex number, its
magnitude is returned. If *x* defines :meth:`__abs__`,
``abs(x)`` returns ``x.__abs__()``.
integer, a floating point number, or an object implementing :meth:`__abs__`.
If the argument is a complex number, its magnitude is returned.
.. function:: all(iterable)