> The editors/IDEs I've used usually only offer rudimentary support in diffs (goto defn, but only in the same file; maybe auto-completion, but usually not for n

> The editors/IDEs I've used usually only offer rudimentary support in diffs (goto defn, but only in the same file; maybe auto-completion, but usually not for newly added items; no refactoring functionality) Sure, but (to me it seems that) that doesn't necessitate the display change he is advocating for. A diff program that has nice code navigation (and/or other IDE features) would be great, but what does that have to do with whether it is displaying the common split-diff, or his take on the split-diff.