#17351: merge with 3.2.
diff --git a/Doc/library/contextlib.rst b/Doc/library/contextlib.rst
index 41dfded..154e395 100644
--- a/Doc/library/contextlib.rst
+++ b/Doc/library/contextlib.rst
@@ -361,7 +361,7 @@
 
    from contextlib import contextmanager, ExitStack
 
-   class ResourceManager(object):
+   class ResourceManager:
 
        def __init__(self, acquire_resource, release_resource, check_resource_ok=None):
            self.acquire_resource = acquire_resource