[docs] [issue33825] Change mentions of "magic" attributes to "special"

Raymond Hettinger <raymond.hettinger@gmail.com> added the comment: Both terms are in common use. There is no need to elide the word "special". ---------- nosy: +rhettinger _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue33825> _______________________________________