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/memoryview.rst b/Doc/c-api/memoryview.rst
index de429e5..24f8c93 100644
--- a/Doc/c-api/memoryview.rst
+++ b/Doc/c-api/memoryview.rst
@@ -45,7 +45,8 @@
.. c:function:: int PyMemoryView_Check(PyObject *obj)
Return true if the object *obj* is a memoryview object. It is not
- currently allowed to create subclasses of :class:`memoryview`.
+ currently allowed to create subclasses of :class:`memoryview`. This
+ function always succeeds.
.. c:function:: Py_buffer *PyMemoryView_GET_BUFFER(PyObject *mview)