History of unit 1 change

In crates/backdrop/src/sky.rs, lines 209–211 on ca0c443c30cfa854e929cc374594a0e4a80f7fa24e0e42e4701734a6d6ef72fb. 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.