Defaults of 'svn diff' not understood

Dear all,

collaborating with others I really like subversion. However, there is
one issue I do not understand; see the log of the following action:

komsys-pc-ruf:PAPER04!62> svn diff paper.tex
komsys-pc-ruf:PAPER04!63> svn stat -v paper.tex
               43 42 ruf paper.tex
komsys-pc-ruf:PAPER04!64> svn update paper.tex
UU paper.tex
Updated to revision 59.
komsys-pc-ruf:PAPER04!65>

The problem:
I am in a working copy. My colleagues have done some commits.
Before I update my local copy. I would like to see the diff'erence.

I assume I can achieve this functionality by running:

    svn diff -r BASE:HEAD paper.tex

But what is the reason that the latter form is not the default
behaviour of 'svn diff'?

Thanks for any enlightenment.

Lukas

-- 
Lukas Ruf           | Wanna know anything about raw |
<http://www.lpr.ch> | IP? -> <http://www.rawip.org> |
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