[PATCH STABLE V2] patch: Always ensure valid git diffs in case source/destination file is missing (issue4046)

[Matt Mackall]

On Mon, 2013-10-21 at 20:17 -0400, Johan Bjork wrote:
> # HG changeset patch
> # User Johan Bjork <jbjoerk at gmail.com>
> # Date 1381667910 14400
> #      Sun Oct 13 08:38:30 2013 -0400
> # Branch stable
> # Node ID 183ddc93dc21411c85b262415efb6fc3de728fa5
> # Parent  2c886dedd9021598b6290d95ea0f068731ea4e2b
> patch: Always ensure valid git diffs in case source/destination file is missing (issue4046)

As mentioned last time around, this breaks tests. In particular, it
breaks these:

Failed test-import.t: output changed
Failed test-shelve.t: output changed

These changes might be correct, but it's your job to figure out what the
test breakage means and update the tests.

-- 
Mathematics is the supreme nostalgia of our time.