Fix typo

Doc/whatsnew/3.3.rst

@@ -704,7 +704,7 @@ programmatic manipulation of context managers and similar cleanup
 functionality. Unlike the previous ``contextlib.nested`` API (which was
 deprecated and removed), the new API is designed to work correctly
 regardless of whether context managers acquire their resources in
-their ``__init`` method (for example, file objects) or in their
+their ``__init__`` method (for example, file objects) or in their
 ``__enter__`` method (for example, synchronisation objects from the
 :mod:`threading` module).