History of issue 4 changes

In crates/oh/src/main.rs, lines 785–892 on 67be8ac00c24637b7b82d659fedbd481c48a17939e6ac1a61454ba2acb575531. 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 785,892:crates/oh/src/main.rs.