Issue #28771: Correct documentation of signatures using const

Doc/c-api/typeobj.rst

@@ -230,8 +230,9 @@ type objects) *must* have the :attr:`ob_size` field.
 
    This field is deprecated.  When it is defined, it should point to a function
    that acts the same as the :c:member:`~PyTypeObject.tp_getattro` function, but taking a C string
-   instead of a Python string object to give the attribute name.  The signature is
-   the same as for :c:func:`PyObject_GetAttrString`.
+   instead of a Python string object to give the attribute name.  The signature is ::
+
+      PyObject * tp_getattr(PyObject *o, char *attr_name);
 
    This field is inherited by subtypes together with :c:member:`~PyTypeObject.tp_getattro`: a subtype
    inherits both :c:member:`~PyTypeObject.tp_getattr` and :c:member:`~PyTypeObject.tp_getattro` from its base type when
@@ -244,10 +245,11 @@ type objects) *must* have the :attr:`ob_size` field.
 
    This field is deprecated.  When it is defined, it should point to a function
    that acts the same as the :c:member:`~PyTypeObject.tp_setattro` function, but taking a C string
-   instead of a Python string object to give the attribute name.  The signature is
-   the same as for :c:func:`PyObject_SetAttrString`, but setting
-   *v* to *NULL* to delete an attribute must be supported.
+   instead of a Python string object to give the attribute name.  The signature is ::
+
+      PyObject * tp_setattr(PyObject *o, char *attr_name, PyObject *v);
 
+   The *v* argument is set to *NULL* to delete the attribute.
    This field is inherited by subtypes together with :c:member:`~PyTypeObject.tp_setattro`: a subtype
    inherits both :c:member:`~PyTypeObject.tp_setattr` and :c:member:`~PyTypeObject.tp_setattro` from its base type when
    the subtype's :c:member:`~PyTypeObject.tp_setattr` and :c:member:`~PyTypeObject.tp_setattro` are both *NULL*.
@@ -1450,7 +1452,7 @@ member in the :c:type:`PyTypeObject` structure should be *NULL*.  Otherwise, the
    all segments in ``*lenp``. The function cannot fail.
 
 
-.. c:type:: Py_ssize_t (*charbufferproc) (PyObject *self, Py_ssize_t segment, const char **ptrptr)
+.. c:type:: Py_ssize_t (*charbufferproc) (PyObject *self, Py_ssize_t segment, char **ptrptr)
 
    Return the size of the segment *segment* that *ptrptr*  is set to.  ``*ptrptr``
    is set to the memory buffer. Returns ``-1`` on error.