History of start 1 change

In crates/backdrop/src/lib.rs, lines 172–290 on 4a4400c5812d3e9fccd65dadec5258ab21a8d8fadacf9c848515360435981738. 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 172,290:crates/backdrop/src/lib.rs.