Log Message:
-----------
Clarify the syntax rules for raw tsvector input.
Modified Files:
--------------
pgsql/doc/src/sgml:
datatype.sgml (r1.216 -> r1.217)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/datatype.sgml?r1=1.216&r2=1.217)