[PATCH] test-context: add test for performing a diff on a memctx

[Sean Farley]

Sean Farley writes:

> # HG changeset patch
> # User Sean Farley <sean.michael.farley at gmail.com>
> # Date 1402700358 25200
> #      Fri Jun 13 15:59:18 2014 -0700
> # Node ID 5f7374fd04954f47b938195d618514ca9d65597f
> # Parent  9bb33f5b140fac3fbc4d97c18f7c17d36835ef15
> test-context: add test for performing a diff on a memctx

Blargh, wrong revset. Drop this one. I've sent the entire series in
another thread.