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/float.rst b/Doc/c-api/float.rst
index b29937d..c107243 100644
--- a/Doc/c-api/float.rst
+++ b/Doc/c-api/float.rst
@@ -22,13 +22,13 @@
.. c:function:: int PyFloat_Check(PyObject *p)
Return true if its argument is a :c:type:`PyFloatObject` or a subtype of
- :c:type:`PyFloatObject`.
+ :c:type:`PyFloatObject`. This function always succeeds.
.. c:function:: int PyFloat_CheckExact(PyObject *p)
Return true if its argument is a :c:type:`PyFloatObject`, but not a subtype of
- :c:type:`PyFloatObject`.
+ :c:type:`PyFloatObject`. This function always succeeds.
.. c:function:: PyObject* PyFloat_FromString(PyObject *str)