Log Message:
-----------
Document why CREATE CONSTRAINT TRIGGER doesn't tab complete.
Modified Files:
--------------
pgsql/src/bin/psql:
tab-complete.c (r1.120 -> r1.121)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/tab-complete.c.diff?r1=1.120&r2=1.121)