History of issue 4 changes

In crates/oh/src/main.rs, lines 759–866 on e5acd2a2ceb5bb8817185afba1e534bbc739758113eb0e92cae108c2435e250a. 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 759,866:crates/oh/src/main.rs.