Add versionadded tags to new math functions.

Doc/library/math.rst

@@ -42,11 +42,15 @@ Number-theoretic and representation functions:
 
    Return the absolute value of *x*.
 
+
 .. function:: factorial(x)
 
    Return *x* factorial.  Raises :exc:`ValueError` if *x* is not integral or
    is negative.
 
+   .. versionadded:: 2.6
+
+
 .. function:: floor(x)
 
    Return the floor of *x* as a float, the largest integer value less than or equal
@@ -107,6 +111,7 @@ Number-theoretic and representation functions:
    Return the fractional and integer parts of *x*.  Both results carry the sign of
    *x*, and both are floats.
 
+
 .. function:: sum(iterable)
 
    Return an accurate floating point sum of values in the iterable.  Avoids
@@ -114,6 +119,9 @@ Number-theoretic and representation functions:
    algorithm's accuracy depends on IEEE-754 arithmetic guarantees and the
    typical case where the rounding mode is half-even.
 
+   .. versionadded:: 2.6
+
+
 .. function:: trunc(x)
 
    Return the :class:`Real` value *x* truncated to an :class:`Integral` (usually
@@ -121,6 +129,7 @@ Number-theoretic and representation functions:
 
    .. versionadded:: 2.6
 
+
 Note that :func:`frexp` and :func:`modf` have a different call/return pattern
 than their C equivalents: they take a single argument and return a pair of
 values, rather than returning their second return value through an 'output
@@ -134,7 +143,6 @@ necessarily has no fractional bits.
 
 Power and logarithmic functions:
 
-
 .. function:: exp(x)
 
    Return ``e**x``.
@@ -179,8 +187,8 @@ Power and logarithmic functions:
 
    Return the square root of *x*.
 
-Trigonometric functions:
 
+Trigonometric functions:
 
 .. function:: acos(x)
 
@@ -227,8 +235,8 @@ Trigonometric functions:
 
    Return the tangent of *x* radians.
 
-Angular conversion:
 
+Angular conversion:
 
 .. function:: degrees(x)
 
@@ -239,8 +247,8 @@ Angular conversion:
 
    Converts angle *x* from degrees to radians.
 
-Hyperbolic functions:
 
+Hyperbolic functions:
 
 .. function:: acosh(x)
 
@@ -278,10 +286,8 @@ Hyperbolic functions:
    Return the hyperbolic tangent of *x*.
 
 
-
 The module also defines two mathematical constants:
 
-
 .. data:: pi
 
    The mathematical constant *pi*.