History of Scene::arrive 1 change

In crates/backdrop/src/scene.rs, lines 21–21 on b9eb70fb95093d2f5542ebc2c94a199d4d7b1c7e1423f1821e20fef9021bd661. Every change that wrote or deleted one of these lines, or deleted a line from between them. Exact, because each line keeps its identity across edits; edits elsewhere in the file are not here. Also: oxy log -L 21,21:crates/backdrop/src/scene.rs.