trivial grammar refactor - Mailing list pgsql-hackers

Hello

I noticed some duplicative coding while hacking on REPACK[1].  We can
save a few lines now with a trivial change to the rules for CHECKPOINT
and REINDEX, and allow to save a few extra lines in that patch.

Any objections to this?

[1] https://commitfest.postgresql.org/patch/5117/

-- 
Álvaro Herrera               48°01'N 7°57'E  —  https://www.EnterpriseDB.com/