Indicate that abs() method accept argument that implement __abs__(), just like call() method in the docs (GH-20509)
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index 90a2370..e9c92f7 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -43,9 +43,8 @@
.. 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)