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)
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