Continue rolling back pep-3141 changes that changed behavior from 2.5. This
round included:
* Revert round to its 2.6 behavior (half away from 0).
* Because round, floor, and ceil always return float again, it's no
longer necessary to have them delegate to __xxx___, so I've ripped
that out of their implementations and the Real ABC. This also helps
in implementing types that work in both 2.6 and 3.0: you return int
from the __xxx__ methods, and let it get enabled by the version
upgrade.
* Make pow(-1, .5) raise a ValueError again.
diff --git a/Doc/reference/expressions.rst b/Doc/reference/expressions.rst
index 9c416f8..ea2bb1a 100644
--- a/Doc/reference/expressions.rst
+++ b/Doc/reference/expressions.rst
@@ -801,8 +801,7 @@
raised).
Raising ``0.0`` to a negative power results in a :exc:`ZeroDivisionError`.
-Raising a negative number to a fractional power results in a :class:`complex`
-number. (Since Python 2.6. In earlier versions it raised a :exc:`ValueError`.)
+Raising a negative number to a fractional power results in a :exc:`ValueError`.
.. _unary: