wit suggestion

Hi Christian

Can I suggest a 'summary diff' option

It's basically a diff between the tree of the commit and the tree of the 
parent commit

It would show what files have changed rather than the diff of the files 
that have changed. (kinda like diffstat without the ++++++++ for now)

(or maybe just do a diffstat if it's easier)

Of course you could click through to a per-file diff eventually...

David

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