File type limitations

[fkromer]

The keyword docs state that it is possible to "Diff two text files" only. I would be interested in contribution to add additional file type support (on Linux). Where (with relation to the code base) would you suggest to "link in"...

[vkosuri]

Thanks @fkromer, you can submit here https://github.com/bulkan/robotframework-difflibrary/blob/master/src/DiffLibrary/keywords.py