Diff misses change

```
Try these:

Lst<String> original = Arrays.asList("line1", "line2", "line3");
List<String> revised = Arrays.asList("line1", "line2-2", "line4");

Patch patch = DiffUtils.diff(original, revised);

position 1 shows as changed, but that is the only delta produced.
```

Original issue reported on code.google.com by `elen...@gmail.com` on 30 Sep 2013 at 9:32
