History of project 6 changes

In crates/oh/src/main.rs, lines 1893–2059 on a9088323c39024e0c4098547ac234cd71589e7a4af0c6b92fd6a343648e85ff2. 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 1893,2059:crates/oh/src/main.rs.