Log Message:
-----------
Change π to plain "pi" in index entry, to avoid double escaping issues.
Modified Files:
--------------
pgsql/doc/src/sgml:
func.sgml (r1.398 -> r1.399)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/func.sgml?r1=1.398&r2=1.399)