[docs] [issue17422] language reference should specify restrictions on class namespace

Caleb Donovick <donovick@cs.stanford.edu> added the comment: While It is perfectly fine behavior for CPython to use a dict, as dict is an ordered mapping. I think Eric is right that the data model should not specify that a dict is necessarily used in the absence of __prepare__. ---------- _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue17422> _______________________________________