SVN & Diff & White Spaces

Hi all,

For our internal needs we've implemented Code Review system integrated with
SVN.

In the server side hook using svnlook we creating diff and then uploading it
to our Code Review system.

The problem is that we cannot ignore 'white spaces' (tabs, spaces.) with
svnlook. We even cannot specify external diff when we using svnlook.

So, how we can solve it?

Thanks!

--
Regards,
Yahor Sinkevich Aleksandrovich