Include versionadded in (c)math.isfinite docs (thanks Ezio Melotti). Other minor doc cleanups.
diff --git a/Doc/library/math.rst b/Doc/library/math.rst
index 22f6f5f..ec3955d 100644
--- a/Doc/library/math.rst
+++ b/Doc/library/math.rst
@@ -102,16 +102,18 @@
Return ``True`` if *x* is neither an infinity nor a NaN, and
``False`` otherwise. (Note that ``0.0`` *is* considered finite.)
+ .. versionadded:: 3.2
+
.. function:: isinf(x)
- Check if the float *x* is positive or negative infinity.
+ Return ``True`` if *x* is a positive or negative infinity, and
+ ``False`` otherwise.
.. function:: isnan(x)
- Check if the float *x* is a NaN (not a number). For more information
- on NaNs, see the IEEE 754 standards.
+ Return ``True`` if *x* is a NaN (not a number), and ``False`` otherwise.
.. function:: ldexp(x, i)