gh-119786: move 'changing grammar' checklist from devguide to Interna…

…lDocs (#1455)

developer-workflow/grammar.rst

@@ -1,70 +1,4 @@
 .. _grammar:
 
-==========================
-Changing CPython's grammar
-==========================
-
-Abstract
-========
-
-There's more to changing Python's grammar than editing
-:cpy-file:`Grammar/python.gram`.  Here's a checklist.
-
-.. note::
-    These instructions are for Python 3.9 and beyond.  Earlier
-    versions use a different parser technology.  You probably shouldn't
-    try to change the grammar of earlier Python versions, but if you
-    really want to, use GitHub to track down the earlier version of this
-    file in the devguide.
-
-For more information on how to use the new parser, check the
-:ref:`section on how to use CPython's parser <parser>`.
-
-Checklist
-=========
-
-Note: sometimes things mysteriously don't work.  Before giving up, try ``make clean``.
-
-* :cpy-file:`Grammar/python.gram`: The grammar, with actions that build AST nodes.
-  After changing it, run ``make regen-pegen`` (or ``build.bat --regen`` on Windows),
-  to regenerate :cpy-file:`Parser/parser.c`.
-  (This runs Python's parser generator, :cpy-file:`Tools/peg_generator`).
-
-* :cpy-file:`Grammar/Tokens` is a place for adding new token types.  After
-  changing it, run ``make regen-token`` to regenerate
-  :cpy-file:`Include/internal/pycore_token.h`, :cpy-file:`Parser/token.c`,
-  :cpy-file:`Lib/token.py` and :cpy-file:`Doc/library/token-list.inc`.
-  If you change both ``python.gram`` and ``Tokens``,
-  run ``make regen-token`` before ``make regen-pegen``.
-  On Windows, ``build.bat --regen`` will regenerate both at the same time.
-
-* :cpy-file:`Parser/Python.asdl` may need changes to match the grammar.
-  Then run ``make regen-ast`` to regenerate
-  :cpy-file:`Include/internal/pycore_ast.h` and :cpy-file:`Python/Python-ast.c`.
-
-* :cpy-file:`Parser/lexer/` contains the tokenization code.
-  This is where you would add a new type of comment or string literal, for example.
-
-* :cpy-file:`Python/ast.c` will need changes to validate AST objects
-  involved with the grammar change.
-
-* :cpy-file:`Python/ast_unparse.c` will need changes to unparse AST
-  involved with the grammar change ("unparsing" is used to turn annotations
-  into strings per :pep:`563`).
-
-* The :ref:`compiler` has its own page.
-
-* ``_Unparser`` in the :cpy-file:`Lib/ast.py` file may need changes
-  to accommodate any modifications in the AST nodes.
-
-* :cpy-file:`Doc/library/ast.rst` may need to be updated to reflect changes
-  to AST nodes.
-
-* Add some usage of your new syntax to ``test_grammar.py``.
-
-* Certain changes may require tweaks to the library module :mod:`pyclbr`.
-
-* :cpy-file:`Lib/tokenize.py` needs changes to match changes to the tokenizer.
-
-* Documentation must be written! Specifically, one or more of the pages in
-  :cpy-file:`Doc/reference/` will need to be updated.
+This document is now part of the
+`CPython Internals Docs <https://github.com/python/cpython/blob/main/InternalDocs/changing_grammar.md>`_.