[BZ#701667] Support aligned (rather than differently sized) comparison chunks
Submitted by Christoph Anton Mitterer
For filediffs/dirdiffs, there should be an option that does the following:
Right now when an addition was made on one side (i.e. green stuff),... there is nothing on the other side, but a small stroke, that shows where the stuff was added.
It would be nice if there was a mode, like one has it in xxdiff, where "empty lines" are added on the other side, so that effectively, the lines/linenumbers are aligned on both sides.