History of unit 1 change

In crates/backdrop/src/sky.rs, lines 209–211 on 42c77f6515c2cecf3b98ba6310feab38c362e69955388d8ec4d4618886d1ef05. 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 209,211:crates/backdrop/src/sky.rs.