Adapt/remove mentions of functions gone in 3.x
diff --git a/Doc/glossary.rst b/Doc/glossary.rst
index 63d4c2b..3b211ae 100644
--- a/Doc/glossary.rst
+++ b/Doc/glossary.rst
@@ -492,7 +492,7 @@
:func:`builtins.open` and :func:`os.open` are distinguished by their
namespaces. Namespaces also aid readability and maintainability by making
it clear which module implements a function. For instance, writing
- :func:`random.seed` or :func:`itertools.izip` makes it clear that those
+ :func:`random.seed` or :func:`itertools.islice` makes it clear that those
functions are implemented by the :mod:`random` and :mod:`itertools`
modules, respectively.