History of Sky::reach 2 changes

In crates/backdrop/src/sky.rs, lines 537–539 on v0.9.20. 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 537,539:crates/backdrop/src/sky.rs.