Add cross-references to the glossary entry for file objects.
diff --git a/Doc/library/exceptions.rst b/Doc/library/exceptions.rst
index 777cf19..a4e2e0e 100644
--- a/Doc/library/exceptions.rst
+++ b/Doc/library/exceptions.rst
@@ -134,8 +134,8 @@
.. exception:: IOError
Raised when an I/O operation (such as the built-in :func:`print` or
- :func:`open` functions or a method of a file object) fails for an I/O-related
- reason, e.g., "file not found" or "disk full".
+ :func:`open` functions or a method of a :term:`file object`) fails for an
+ I/O-related reason, e.g., "file not found" or "disk full".
This class is derived from :exc:`EnvironmentError`. See the discussion above
for more information on exception instance attributes.