PEP 687: amendments after feedback (python#2521)

Co-authored-by: Petr Viktorin <encukou@gmail.com>

pep-0687.rst

@@ -8,8 +8,8 @@ Content-Type: text/x-rst
 Requires: 489, 573, 630
 Created: 04-Apr-2022
 Python-Version: 3.11
-Post-History: `04-Apr-2022 <https://discuss.python.org/t/14824>`__
-
+Post-History: `04-Apr-2022 <https://discuss.python.org/t/14824>`__,
+              `11-Apr-2022 <https://mail.python.org/archives/list/python-dev@python.org/thread/B3HYQIE4Z5WBJCC3FUZJZHXLM32I4BZA/>`__
 
 Abstract
 ========
@@ -67,6 +67,9 @@ All stdlib extension modules will be *isolated*. That is:
 Conversion to heap types
 ------------------------
 
+Static types that do not need module state access, and have no other reason to
+be converted, should stay static.
+
 Types whose methods need access to their module instance will be converted
 to heap types following :pep:`630`, with the following considerations:
 
@@ -97,9 +100,6 @@ If another kind of issue is found, the module in question should be unchanged
 until a solution is found and added to the Devguide, and already
 converted modules are checked and fixed.
 
-Static types that do not need module state access, and have no other reason to
-be converted, should stay static.
-
 
 Process
 -------
@@ -137,7 +137,7 @@ smaller modules.
 3. Add relevant global variables to the module state ``struct``, and modify code
    that accesses the global state to use the module state helpers instead. This
    step may be broken into several PR's.
-4. Where necessary, convert heap types to static types.
+4. Where necessary, convert static types to heap types.
 5. Convert the global module state struct to true module state.
 6. Implement multi-phase initialisation.