[3.9] bpo-17852: Doc: Fix the tutorial about closing files (GH-23135) (GH-23527)



Co-authored-by: Inada Naoki <songofacandy@gmail.com>
(cherry picked from commit c8aaf71dde4888864c0c351e2f935f87652c3d54)


Co-authored-by: Volker-Weissmann <39418860+Volker-Weissmann@users.noreply.github.com>
1 file changed