Add versionadded tags for (c)math.tau.

birkenfeld · birkenfeld · commit 4770d6ec7632 · 2016-08-16T07:08:46.000+02:00
diff --git a/Doc/library/cmath.rst b/Doc/library/cmath.rst
@@ -257,6 +257,8 @@ Constants
 
    The mathematical constant *τ*, as a float.
 
+   .. versionadded:: 3.6
+
 .. index:: module: math
 
 Note that the selection of functions is similar, but not identical, to that in
diff --git a/Doc/library/math.rst b/Doc/library/math.rst
@@ -434,6 +434,8 @@ Constants
    Wrong <https://www.youtube.com/watch?v=jG7vhMMXagQ>`_, and start celebrating
    `Tau day <http://tauday.com/>`_ by eating twice as much pie!
 
+   .. versionadded:: 3.6
+
 .. data:: inf
 
    A floating-point positive infinity.  (For negative infinity, use
