[3.9] bpo-42958: Improve description of shallow= in filecmp.cmp docs (GH-27166) by miss-islington · Pull Request #27608 · python/cpython

@akulakov @miss-islington

…nGH-27166)

Co-authored-by: Łukasz Langa <lukasz@langa.pl>
Co-authored-by: Alexander Vandenbulcke <alexander.vandenbulcke95@gmail.com>
(cherry picked from commit a8dc489)

Co-authored-by: andrei kulakov <andrei.avk@gmail.com>