Diff but not patch
Diffy is almost what I needed, except for the part where I also wanted to generate patches from a diff.
Is this feature being considered for the long run?
For this kind of functionality you may want to just drop down to using unix diff or a similar tool to generate the patch, since this is what diffy uses under the covers. If you provide some more info about your use case I may be able to point you in the right direction or better understand how diffy could be improved.
@fgarcia ... I have the same issue. More than a diff tool, I need a machine to create patches and move backward/forward when requested. Have you found such gem?