Add missing quote_identifier calls for CREATE TRIGGER ... REFERENCING.
Mixed-case names for transition tables weren't dumped correctly.
Oversight in commit
8c48375e5, per bug #15440 from Karl Czajkowski.
In passing, I couldn't resist a bit of code beautification.
Back-patch to v10 where this was introduced.
Discussion: https://postgr.es/m/15440-
02d1468e94d63d76@postgresql.org