Fix warnings from "make check".
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index b535c22..807245f 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -417,7 +417,7 @@
specific.
If given, *default* will be returned if the object does not provide means to
- retrieve the size. Otherwise a `TypeError` will be raised.
+ retrieve the size. Otherwise a :exc:`TypeError` will be raised.
:func:`getsizeof` calls the object's ``__sizeof__`` method and adds an
additional garbage collector overhead if the object is managed by the garbage