bpo-45464: [doc] Explain that subclassing multiple exceptions is fragile (GH-29094) (GH-29104)

Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
(cherry picked from commit dff0b713436e286bb1afdd7c6f3093c8e8db16dd)

Co-authored-by: Ɓukasz Langa <lukasz@langa.pl>
2 files changed