Why `git range-diff` does not respect -w -b options?

Question

When git displays diff, there are implemented -w -b options in many places which ignores space changes. But occasionally git diff-range does not implement them. Why?

It would be useful to hide space changes in many cases (as for usual diff). For example:

Here these lines makes useless noise =(

$c->user->update({
  lastseen       => \'now()',
  seen_from_ip   => $ip,
  seen_from_city => $city,
});