Log Message:-----------Minor tweaks for PL/PgSQL documentation.
Modified Files:-------------- pgsql/doc/src/sgml: plpgsql.sgml (r1.76 -> r1.77) (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/plpgsql.sgml.diff?r1=1.76&r2=1.77)
