Log Message:
-----------
Fix psql history handling so 'execute' backslash commands (\g)
remain as part of the multi-line query.
Modified Files:
--------------
pgsql/src/bin/psql:
mainloop.c (r1.72 -> r1.73)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/bin/psql/mainloop.c.diff?r1=1.72&r2=1.73)