Fix for edge case Diff::LCS traversals. Also ensure re-edit state is
cleared in between attempts.
66ab8df0b6c8bb0dcb5dce8a7e8cd6a28e6c7c04 0.2
46dfe9d6f3680bf38aeddda68f014fc8bf6517fc 0.3
664bbe3dcd44e842559978725bf2128538a2b40a 0.4
12f279ef4f9d03b12dffc30eb96cde1fdd456bbe 0.5
4e77e8e5d4672cc8ef0cd608f00a8ed4ed305342 0.7
27bbe75233a3da1482fededd7f67215bc716b2d5 1.0.0