bpo-42395: Add aclosing to __all__ (GH-23356)
Automerge-Triggered-By: GH:asvetlov
diff --git a/Lib/contextlib.py b/Lib/contextlib.py
index a0b523c..eb59461 100644
--- a/Lib/contextlib.py
+++ b/Lib/contextlib.py
@@ -9,7 +9,7 @@
__all__ = ["asynccontextmanager", "contextmanager", "closing", "nullcontext",
"AbstractContextManager", "AbstractAsyncContextManager",
"AsyncExitStack", "ContextDecorator", "ExitStack",
- "redirect_stdout", "redirect_stderr", "suppress"]
+ "redirect_stdout", "redirect_stderr", "suppress", "aclosing"]
class AbstractContextManager(abc.ABC):