pub fn register_diff_modeline_element(svc: &ModelineService)Expand description
Register the diff modeline descriptor (ML.3). Scope::Global: the
active document’s session sign-map is a single shared value, so the
summary renders on the active pane’s modeline (the renderer gates
Global elements to the active pane, modeline.md §7) — there is no
distinct per-side count to show. Content is computed host-side on the
actor (where the sign map already lives, sync_diff_modeline_element)
rather than counted on the render thread (paramount #1). Left zone,
after core.path.