History of issue 4 changes

In crates/oh/src/main.rs, lines 1119–1226 on 6a306cd03fc12d18a52869bd400e9541b4c7392afdc914963dc81492f0c00fdd. 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 1119,1226:crates/oh/src/main.rs.