History of arrive 2 changes

In crates/backdrop/src/lib.rs, lines 212–230 on 64e5964e9f132a1a209dd85292a1671d9324cd5cc3786d094ab12d18c9377f1e. 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.