History of tests::sky 2 changes

In crates/backdrop/src/sky.rs, lines 587–596 on 7a91f1fd71b09f32816e316011e96e445f6600218d72b1c575038c795e8f0003. 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 587,596:crates/backdrop/src/sky.rs.