pgsql: Wording improvements

Log Message:
-----------
Wording improvements

Modified Files:
--------------
    pgsql/src/backend/tsearch:
        ts_utils.c (r1.7 -> r1.8)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/tsearch/ts_utils.c?r1=1.7&r2=1.8)
    pgsql/src/backend/utils/adt:
        tsquery.c (r1.12 -> r1.13)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tsquery.c?r1=1.12&r2=1.13)
        tsquery_cleanup.c (r1.8 -> r1.9)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tsquery_cleanup.c?r1=1.8&r2=1.9)
        tsvector_op.c (r1.10 -> r1.11)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/tsvector_op.c?r1=1.10&r2=1.11)
    pgsql/src/backend/utils/misc:
        guc.c (r1.426 -> r1.427)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/misc/guc.c?r1=1.426&r2=1.427)
    pgsql/src/port:
        open.c (r1.23 -> r1.24)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/port/open.c?r1=1.23&r2=1.24)