> > You need to loop over each line and get the diff_hlID() for that
> > position.

> > Each line, where diff_hlID() returns zero you need to delete.

> > Of course, you can do it in one step ;)

> > exe ':g/'. join(map(filter(range(1,line('$')), '!diff_hlID(v:val,
> > 0)'), '

> > ''\%''.v:val."l"'), '\|'). '/d'

> > But, this works only once, you can't do this for all buffers at the

> > same time, since after you changed the first buffer the syntax
> > highlighting

> > for the other will be completely different and there will be no more

> > items being in common at the following buffers.

> But, you could next undo the (single) change in the first buffer,
> repeat the process on the second buffer, then redo the change in the
> first buffer.