History of Engine::fit 3 changes

In crates/backdrop/src/lib.rs, lines 65–81 on 2cbf6f348595a76d5d26de2df8f3c15859e9425ee879b07f3ae1c7116bf4e8e9. 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 65,81:crates/backdrop/src/lib.rs.