History of project 3 changes

In crates/oh/src/main.rs, lines 1213–1327 on 59338826539ca185be617d96deaa09a2b24a32c37bc11d57c3ecf5a32679f606. 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 1213,1327:crates/oh/src/main.rs.