dataclasses docs: add a missing word. (GH-25839)
diff --git a/Doc/library/dataclasses.rst b/Doc/library/dataclasses.rst
index 357ea98..64540b3 100644
--- a/Doc/library/dataclasses.rst
+++ b/Doc/library/dataclasses.rst
@@ -439,7 +439,7 @@
.. data:: KW_ONLY
- A sentinel value used a type annotation. Any fields after a
+ A sentinel value used as a type annotation. Any fields after a
pseudo-field with the type of :const:`KW_ONLY` are marked as
keyword-only fields. Note that a pseudo-field of type
:const:`KW_ONLY` is otherwise completely ignored. This includes the