Stefan Monnier <monnier@IRO.UMontreal.CA> writes:

>> What does M-x diff-buffer-with-file not do what you are trying to
>> achieve?
>> Also M-x ediff-current-file might be usable.
>
> Not sure I understand the question: neither of those modifies the
> current buffer, right?

With ediff you can apply chunks, but I'm not sure what kind of an
interface you would like to have?


-- Toon