History of project 6 changes

In crates/oh/src/main.rs, lines 1728–1894 on 439ecd8708a13ffd255537fab186ab2b3f49ef9f6a8684d55b0b294d434d6ab7. 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 1728,1894:crates/oh/src/main.rs.