[docs] [issue39096] "Format Specification Mini-Language" doc mistake for Decimal

Mark Dickinson <dickinsm@gmail.com> added the comment: The 'default precision' issue is addressed; the issues that Michael reported about the `None` presentation type are still valid, I think. ---------- _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue39096> _______________________________________