History of project 6 changes

In crates/oh/src/main.rs, lines 1746–1912 on f87a74fffc8715b03636a4f59ff2a5ec4fe564a9f9c7521a03a1bfaf5fa04773. 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.