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/bytes.rst b/Doc/c-api/bytes.rst
index 0e33ed2..de65701 100644
--- a/Doc/c-api/bytes.rst
+++ b/Doc/c-api/bytes.rst
@@ -25,13 +25,13 @@
.. c:function:: int PyBytes_Check(PyObject *o)
Return true if the object *o* is a bytes object or an instance of a subtype
- of the bytes type.
+ of the bytes type. This function always succeeds.
.. c:function:: int PyBytes_CheckExact(PyObject *o)
Return true if the object *o* is a bytes object, but not an instance of a
- subtype of the bytes type.
+ subtype of the bytes type. This function always succeeds.
.. c:function:: PyObject* PyBytes_FromString(const char *v)