bpo-45217: adds note that `allow_no_value` in `configparser` is optional (GH-28396) (GH-28418)

Co-authored-by: Ɓukasz Langa <lukasz@langa.pl>
(cherry picked from commit cb07838ab756564988b1ffd23871f1222a832446)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
1 file changed