Hi,

I've mentioned this on IRC a bunch of times to people but I figure I'll
mention it here in case anyone finds it useful.

Our use of git doesn't lend itself well to the default mode `git diff`
and friends operate in, as we create many new files rather than solely
changing existing ones.

git can be coerced into checking for copies (and doing so "harder" too)
but there's no configuration option for this, and it's a pain to
remember.

You can use the attached patch for dev-vcs/git and then set:
$ git config diff.renames copies-harder
in gentoo.git to make `git log -p`, `git diff`, etc default to this
mode.

IME, it makes reviewing much easier. Be warned that it does make git log
a bit slower though if the config option is enabled for a repo -- but
maybe only noticeably if your repo is grafted with the pre-2015 CVS history.