Stackless issue #265: merge changelog entries for this issue

Author: Anselm Kruis

Stackless/changelog.txt

@@ -10,20 +10,14 @@ What's New in Stackless 3.X.X?
 *Release date: 20XX-XX-XX*
 
 - https://github.com/stackless-dev/stackless/issues/265
-  Fix invalid function cast warnings with gcc 8 for method conventions
+  Fix (invalid) function cast warnings with gcc 8 for method conventions
   different from METH_NOARGS, METH_O and METH_VARARGS excluding Argument Clinic
   generated code.
-
-- https://github.com/stackless-dev/stackless/issues/265
   Most (getter)-functions, (setter)-functions and (PyCFunction)-functions with
   flag METH_NOARGS used to lack an unused last argument, "void *" for (getter)
   and (setter), "PyObject *" for (PyCFunction)-functions.
-
-- https://github.com/stackless-dev/stackless/issues/265
   Avoid undefined behavior, if Stackless classes implement __reduce__() and
   __reduce_ex__() using a single C-function.
-
-- https://github.com/stackless-dev/stackless/issues/265
   Fix C-API functions PyChannel_Send(), PyChannel_Send_nr(),
   PyChannel_Receive(), PyChannel_Receive_nr(), and
   PyObject_Call(&PyTasklet_Type, PyObject *args, PyObject *kwargs) if called