History of Sky::label 2 changes

In crates/backdrop/src/sky.rs, lines 543–554 on 4b49c41599f3a29fdc805361569e0eaea120d7e96f1c6212bf7d7814f10481c3. 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 543,554:crates/backdrop/src/sky.rs.