History of project 6 changes

In crates/oh/src/main.rs, lines 1746–1912 on d2263e299da7b94c34efdbabdf0f5232fcb7e0ac463a85dd9987532a9b0bf718. 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 1746,1912:crates/oh/src/main.rs.