bpo-44752: refactor part of rlcompleter.Completer.attr_matches (GH-27433) (GH-27447)

(cherry picked from commit 6741794dd420c6b9775a188690dbf265037cd69f)

Co-authored-by: Jack DeVries <58614260+jdevries3133@users.noreply.github.com>
1 file changed