History of issue 4 changes

In crates/oh/src/main.rs, lines 1296–1403 on 9bbca80f777aed6309fc4ad96021778b69027408c2822cdcaedd22027bd0c2b2. 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 1296,1403:crates/oh/src/main.rs.