Georg Brandl  committed b4d8234

Add versionadded tags to new math functions.

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File Doc/library/math.rst

    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
    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
    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
    .. 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
 Power and logarithmic functions:
 .. function:: exp(x)
    Return ``e**x``.
    Return the square root of *x*.
 Trigonometric functions:
 .. function:: acos(x)
    Return the arc cosine of *x*, in radians.
    Return the tangent of *x* radians.
 Angular conversion:
 .. function:: degrees(x)
    Converts angle *x* from radians to degrees.
    Converts angle *x* from degrees to radians.
 Hyperbolic functions:
 .. function:: acosh(x)
    Return the inverse hyperbolic cosine of *x*.
    Return the hyperbolic tangent of *x*.
 The module also defines two mathematical constants:
 .. data:: pi
    The mathematical constant *pi*.