History of Engine::fit 3 changes

In crates/backdrop/src/lib.rs, lines 65–81 on 9041db4e4d925a26a14f3fcafe1a3c4c771bfd49051ebcbd7c1e0cf258547f2d. 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.