bpo-41832: Restore note about NULL in PyType_Slot.pfunc (GH-23243)

diff --git a/Doc/c-api/type.rst b/Doc/c-api/type.rst
index f9037c89d8bd3b7cf20cd080e67eeb46d78ffdf3..84c0a02046a65e761223d4a1a7ae886f7f8194d6 100644 (file)
--- a/Doc/c-api/type.rst
+++ b/Doc/c-api/type.rst
@@ -265,3 +265,5 @@ The following functions and structs are used to create
 
       The desired value of the slot. In most cases, this is a pointer
       to a function.
+
+      Slots other than ``Py_tp_doc`` may not be ``NULL``.