[F&O] IBM-FO-025: Need better example for comparing times

(IBM-FO-025): Section 9.3.8, op:dateTime-equal(), would benefit from an 
example of comparing two dateTimes that are equal although their 
normalized values are in different days. For example, what is the result 
of op:dateTime-equal(xs:dateTime("2002-04-02T23:00:00-04:00"), 
xs:dateTime("2002-04-03T02:00:00-01:00"))? (I predict the answer is True.)

--Don Chamberlin