Word diff mode

```
Hello,

First of all, thanks for the work done. It is a very useful API. I have tried
to add the 'Word mode' diff following the instructions you gave above, but it
does not seem to work. Can you, please, give me (and perhaps for others)
another example? Or why not adding a mode variable in the class with which you
can have the diff by chars, words or lines (depending on its value)?

Regards,
Emmanuel

```

Original issue reported on code.google.com by `zygolech...@gmail.com` on 5 Oct 2011 at 6:52