fix typo in glossary
diff --git a/Doc/glossary.rst b/Doc/glossary.rst
index b44c5cc..e5b3847 100644
--- a/Doc/glossary.rst
+++ b/Doc/glossary.rst
@@ -194,7 +194,7 @@
An object exposing a file-oriented API (with methods such as
:meth:`read()` or :meth:`write()`) to an underlying resource. Depending
on the way it was created, a file object can mediate access to a real
- on-disk file or to another other type of storage or communication device
+ on-disk file or to another type of storage or communication device
(for example standard input/output, in-memory buffers, sockets, pipes,
etc.). File objects are also called :dfn:`file-like objects` or
:dfn:`streams`.