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Docs: Clarify the before_and_after() example (GH-28458) (#28464)

(cherry picked from commit fcbf9b176b1190301c760a921601c6488ef8b070)

Co-authored-by: Raymond Hettinger <rhettinger@users.noreply.github.com>

Co-authored-by: Raymond Hettinger <rhettinger@users.noreply.github.com>
M
Miss Islington (bot) committed
697b6650ed29cdd4c347e9d35c43e084eff22c5f
Parent: 0e96086
Committed by GitHub <noreply@github.com> on 9/20/2021, 1:53:37 AM