History of Sky::layout 3 changes

In crates/backdrop/src/sky.rs, lines 304–343 on 0468394734e96d5db008f4e36827ed560766ae8742e0e42ed4ac7184f49242e5. 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.