python · Mariatta · Mar 30, 2017 · Mar 29, 2017
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
@@ -1233,9 +1233,9 @@ are always available.  They are listed here in alphabetical order.

 .. function:: round(number[, ndigits])

-   Return the floating point value *number* rounded to *ndigits* digits after
-   the decimal point.  If *ndigits* is omitted or is ``None``, it returns the
-   nearest integer to its input.  Delegates to ``number.__round__(ndigits)``.
+   Return *number* rounded to *ndigits* precision after the decimal
+   point.  If *ndigits* is omitted or is ``None``, it returns the
+   nearest integer to its input.

   For the built-in types supporting :func:`round`, values are rounded to the
   closest multiple of 10 to the power minus *ndigits*; if two multiples are
@@ -1245,6 +1245,9 @@ are always available.  They are listed here in alphabetical order.
   negative).  The return value is an integer if called with one argument,
   otherwise of the same type as *number*.

+   For a general Python object ``number``, ``round(number, ndigits)`` delegates to
+   ``number.__round__(ndigits)``.
+
   .. note::

      The behavior of :func:`round` for floats can be surprising: for example,