patch: hg log --diffstat

[Bryan O'Sullivan]

Jamie Webb wrote:
> The attached patch adds an option to hg log (and incoming and outgoing)
> to get a diffstat for each revision. Is this useful to anyone?

It looks reasonable, although it's a bit weird that log alone would
sprout the ability to produce a diffstat, but not more obvious commands
such as diff or export.

The email extension uses -d for the short diffstat option.  For
consistency, log should use the same letter, or quite likely not have a
short option at all.

Also, I notice that if one uses both -p and -s, the diffstat gets
printed after the patch.  That seems wrong.

	<b