History of arrive 2 changes

In crates/backdrop/src/lib.rs, lines 212–230 on e57765dee61a999dfb499c229a7903bcf3102d8976fb0abaf55b2314d777b705. 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 212,230:crates/backdrop/src/lib.rs.