Log Message:
-----------
In tsearch code, remove !(A && B) via restructuring, for clarity
Modified Files:
--------------
pgsql/src/backend/tsearch:
dict_thesaurus.c (r1.4 -> r1.5)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/dict_thesaurus.c?r1=1.4&r2=1.5)