Issue 21558: Fix a typo in the contextlib docs
diff --git a/Doc/library/contextlib.rst b/Doc/library/contextlib.rst
index 82efd0c..9f174d7 100644
--- a/Doc/library/contextlib.rst
+++ b/Doc/library/contextlib.rst
@@ -371,7 +371,7 @@
with ExitStack() as stack:
for resource in resources:
stack.enter_context(resource)
- if need_special resource:
+ if need_special_resource():
special = acquire_special_resource()
stack.callback(release_special_resource, special)
# Perform operations that use the acquired resources