gh-108267 Fix another dataclasses docs typo (#119277)

AlexWaygood · web-flow · commit 423bbcbbc43c · 2024-05-20T22:34:57.000Z
diff --git a/Doc/library/dataclasses.rst b/Doc/library/dataclasses.rst
@@ -616,7 +616,8 @@ methods will raise a :exc:`FrozenInstanceError` when invoked.
 There is a tiny performance penalty when using ``frozen=True``:
 :meth:`~object.__init__` cannot use simple assignment to initialize fields, and
 must use :meth:`!object.__setattr__`.
-.. Make sure to not remove "object" from "object.__setattr__" in the above markup
+
+.. Make sure to not remove "object" from "object.__setattr__" in the above markup!
 
 .. _dataclasses-inheritance:
 
