Include versionadded in (c)math.isfinite docs (thanks Ezio Melotti). Other minor doc cleanups.
diff --git a/Doc/library/cmath.rst b/Doc/library/cmath.rst
index ae94039..d7778df 100644
--- a/Doc/library/cmath.rst
+++ b/Doc/library/cmath.rst
@@ -189,19 +189,22 @@
.. function:: isfinite(x)
- Return ``True`` if both the real and imaginary parts of *x* are finite,
- and ``False`` otherwise.
+ Return ``True`` if both the real and imaginary parts of *x* are finite, and
+ ``False`` otherwise.
+
+ .. versionadded:: 3.2
.. function:: isinf(x)
- Return *True* if the real or the imaginary part of x is positive
- or negative infinity.
+ Return ``True`` if either the real or the imaginary part of *x* is an
+ infinity, and ``False`` otherwise.
.. function:: isnan(x)
- Return *True* if the real or imaginary part of x is not a number (NaN).
+ Return ``True`` if either the real or the imaginary part of *x* is a NaN,
+ and ``False`` otherwise.
Constants