History of arrive 2 changes

In crates/backdrop/src/lib.rs, lines 212–230 on 8aa5ef384ef18424402f7417566ca62c03326a2769205b694d4a07f55e7c6a5b. 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.