Should copy/rename detection consider file overwrites?

Hi,

While fooling around with copy/rename detection, I noticed that it doesn't detect the case where you copy or rename a file on top of another:

$ git init $ (echo foo; echo bar) > foo $ git add foo $ git commit -m foo $ echo 0 > bar $ git add bar $ git commit -m bar $ git mv -f foo bar $ git commit -m foobar $ git log --oneline --reverse 7dc2765 foo b0c837d bar 88caeba foobar $ git blame -s -C -C bar 88caebab 1) foo 88caebab 2) bar

I can see how this is not trivially representable in e.g. git diff-tree, but shouldn't at least blame try to tell that those lines actually come from 7dc2765?

Mike