commit-email.pl: supressing diff for certain filetypes?

Hello,

I am using the commit-email.pl script to receive emails about changes to
our repository. It is great!

The only problem is that it likes to diff .pdf files, resulting in huge
emails of mostly hex garbage.

Can it be told to only diff files with (or without) certain filename
extensions?

Thanks,

-- 
____________________________________________________________
Sean McBride, B. Eng                 sean@rogue-research.com
Rogue Research                        www.rogue-research.com 
Mac Software Developer              Montréal, Québec, Canada
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