[doc] Improve punctuation atexit doc (GH-25629) (GH-26856)

(cherry picked from commit a6b47de07a304eaa37a1c5554ed00a3ec91f8407)

Co-authored-by: Géry Ogam <gery.ogam@gmail.com>

Co-authored-by: Géry Ogam <gery.ogam@gmail.com>
1 file changed