typing docs: Fix formatting issue (python#119210)

davidfstr · web-flow · commit 72d07dd30bc1 · 2024-05-20T14:32:51.000Z
diff --git a/Doc/library/typing.rst b/Doc/library/typing.rst
@@ -2546,7 +2546,7 @@ types.
          ``__required_keys__`` and ``__optional_keys__`` rely on may not work
          properly, and the values of the attributes may be incorrect.
 
-   Support for :data:`ReadOnly` is reflected in the following attributes::
+   Support for :data:`ReadOnly` is reflected in the following attributes:
 
    .. attribute:: __readonly_keys__
 
