History of project 3 changes

In crates/oh/src/main.rs, lines 1657–1771 on 166f6e9bf4f134de4e0de65a2d4453aa82c04cbcff14f3854bb7e8a7ee361182. 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 1657,1771:crates/oh/src/main.rs.