History of arrive 2 changes

In crates/backdrop/src/lib.rs, lines 212–230 on 559c392042340dc03180c163b407dd81c2f042df30441918b4254b482e7b3b64. 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.