History of Sky::layout 3 changes

In crates/backdrop/src/sky.rs, lines 304–343 on 5360cea36c30a7236e2fb61a89c48f7cc65132f1af97caae4780e8b664ee15ea. 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 304,343:crates/backdrop/src/sky.rs.