History of issue 4 changes

In crates/oh/src/main.rs, lines 759–866 on 6246d1e51f4fdb99485662612d4148901d1456d34c65f0ecf80643da769d634e. 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.