error in plpgsql-statements.html#PLPGSQL-SELECT-INTO

Hi. I have just learned how to create my own triggers on plpgsql
language, and I think I have discover an error into the doc:

http://www.postgresql.org/docs/current/static/plpgsql-statements.html#PLPGSQL-SELECT-INTO
------------------------------------------------------------------------

DECLARE
users_rec RECORD;
full_name varchar;
BEGIN
SELECT INTO users_rec * FROM users WHERE user_id=3;

IF users_rec.homepage IS NULL THEN
-- user entered no homepage, return "http://"
RETURN ''http://'';
END IF;
END;

------------------------------------------------------------------------
full_name declared, but not used.