History of arrive 2 changes

In crates/backdrop/src/lib.rs, lines 212–230 on a2ef53c5db269fa8bc86bb8abb13bb10ccba916129a301ca8738cb4829ff6680. 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.