[docs] [issue35105] Document that CPython accepts "invalid" identifiers

[Windson Yang]

Windson Yang <wiwindson at gmail.com> added the comment:

I agreed we should document it, it' not obvious to me at least.

----------
nosy: +Windson Yang

_______________________________________
Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue35105>
_______________________________________