bpo-42528: Improve the docs of most Py*_Check{,Exact} API calls (GH-23602)
I think that none of these API calls can fail, but only few of them are
documented as such. Add the sentence "This function always succeeds" (which is
the same already used e.g. by PyNumber_Check) to all of them.diff --git a/Doc/c-api/module.rst b/Doc/c-api/module.rst
index 41a705d..a2541af 100644
--- a/Doc/c-api/module.rst
+++ b/Doc/c-api/module.rst
@@ -19,12 +19,13 @@
.. c:function:: int PyModule_Check(PyObject *p)
Return true if *p* is a module object, or a subtype of a module object.
+ This function always succeeds.
.. c:function:: int PyModule_CheckExact(PyObject *p)
Return true if *p* is a module object, but not a subtype of
- :c:data:`PyModule_Type`.
+ :c:data:`PyModule_Type`. This function always succeeds.
.. c:function:: PyObject* PyModule_NewObject(PyObject *name)