bpo-39301: State that floor division is used for right shift operations (GH-20347) (GH-20414)

* bpo-39301: State that floor division is used for right shift operations

* Remove "without overflow check"
(cherry picked from commit af7553ac95a96713be847dd45bc5a8aeb0a75955)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>

Co-authored-by: Zackery Spytz <zspytz@gmail.com>
1 file changed