History of arrive 2 changes

In crates/backdrop/src/lib.rs, lines 212–230 on 6aedcd6c0ad2c07f478a4943554f038a7f629299e94f6662aba8ee4611c8a3b2. 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.