On Fri, 15 Dec 2006, Shawn Pearce wrote:

I do the same (diff a lot before commit) and thus find commit
outputting anything at all to be noisy and irritating.  Frankly
the new

  git-diff-tree --summary --root --no-commit-id HEAD

that Junio put on the end is already irritating.

But it was added to help users verify that commit did what they
thought it would (see 61f5cb7f).  By the same token sometimes users
accidentally commit files they didn't mean to, or forget to include
files they meant to include.  Showing a diffstat would also be a
final sanity check for them.

Make it with -v.

If the --summary is already irritating to you, imagine how a diffstat 
could be.