Update doctest

HexDecimal · HexDecimal · commit d75ee9a9f139 · 2026-04-24T16:28:55.000-07:00
diff --git a/doc/index.rst b/doc/index.rst
@@ -1097,6 +1097,7 @@ Sentinel objects
 
    Example::
 
+      >>> from typing_extensions import sentinel
       >>> class MyClass:
       ...     MISSING = sentinel('MyClass.MISSING')
 
