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/code.rst b/Doc/c-api/code.rst
index 6f8c41c..b3a17f1 100644
--- a/Doc/c-api/code.rst
+++ b/Doc/c-api/code.rst
@@ -27,7 +27,7 @@
.. c:function:: int PyCode_Check(PyObject *co)
- Return true if *co* is a :class:`code` object.
+ Return true if *co* is a :class:`code` object. This function always succeeds.
.. c:function:: int PyCode_GetNumFree(PyCodeObject *co)