Some buffers should have support for “full vimdiff”
aurum://diff should have a mapping that opens multiple tabs.
aurum://log should support at least two such mappings: one that diffs working directory and current revision and one that diffs current revision and its first parent.
aurum://status should support v:count and visual-mode “full vimdiff” mapping.
aurum://diff should be able to use “full vimdiff” to view current diff as side-by-side file comparison in multiple tabs.