History of arrive 2 changes

In crates/backdrop/src/lib.rs, lines 212–230 on d74ce22fa80e989c9d335c5a4ace5bc3f2548b941325212210e240c3968eb537. 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.