-log(x) -/-> log(1/x); check to put neg log's arg in denom

It's a matter of aesthetics ... I prefer to keep the -1 out in front of
the log. If there are others that it would join with, this doesn't matter
since log(x) - log(y) -> log(x) + log(1/y) -> log(x*1/y) -> log(x/y)
But when forming an exponent, log(-log(y)) looks better, I think, than
log(log(1/y)).