To really omit the added lines, you will have to write a custom diff function, cp. :help diff-diffexpr.
If you just don't want to see the added lines (because they're too visually distracting), you can modify the DiffAdd highlight group to show white-on-white (or black-on-black in the console) text (or any other low-contrast coloring, in a similar way:
To really omit the added lines, you will have to write a custom diff function, cp.
:help diff-diffexpr
.If you just don't want to see the added lines (because they're too visually distracting), you can modify the
DiffAdd
highlight group to show white-on-white (or black-on-black in the console) text (or any other low-contrast coloring, in a similar way: