Log Message:
-----------
Support "" for thousands separator and plus sign in to_char(), per
report from French Debian user. psql already handles "" fine.
Modified Files:
--------------
pgsql/src/backend/utils/adt:
formatting.c (r1.104 -> r1.105)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/formatting.c.diff?r1=1.104&r2=1.105)