Fix misleading statement about mixed-type numeric comparisons (GH-18615)

Author: mdickinson

Doc/library/stdtypes.rst

@@ -261,8 +261,10 @@ and imaginary parts.
 Python fully supports mixed arithmetic: when a binary arithmetic operator has
 operands of different numeric types, the operand with the "narrower" type is
 widened to that of the other, where integer is narrower than floating point,
-which is narrower than complex.  Comparisons between numbers of mixed type use
-the same rule. [2]_ The constructors :func:`int`, :func:`float`, and
+which is narrower than complex. A comparison between numbers of different types
+behaves as though the exact values of those numbers were being compared. [2]_
+
+The constructors :func:`int`, :func:`float`, and
 :func:`complex` can be used to produce numbers of a specific type.
 
 All numeric types (except complex) support the following operations (for priorities of

Misc/NEWS.d/next/Documentation/2020-02-23-13-26-40.bpo-39530._bCvzQ.rst

@@ -0,0 +1 @@
+Fix misleading documentation about mixed-type numeric comparisons.