History of project 6 changes

In crates/oh/src/main.rs, lines 1890–2056 on 5a9a6e9a15bcda9919eae94e7b6a2e5f31530f40ed04688745e3cf21ddc02e94. 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 1890,2056:crates/oh/src/main.rs.