History of project 3 changes

In crates/oh/src/main.rs, lines 1309–1423 on c65b0f0a196f46443ebe9ac11f160486341ecce53a9e1a79100321e55dec566a. 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 1309,1423:crates/oh/src/main.rs.