History of issue 4 changes

In crates/oh/src/main.rs, lines 759–866 on 6adcd68b90b10957250797a6db8e73adbefd6d9a60d7f2bdead5bc5e74eb0983. 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.