History of issue 4 changes

In crates/oh/src/main.rs, lines 1299–1406 on 668b2ad7495ce300ca09b4436b280dfd9a141febdf0f93ee420ac08c9f9b6fd5. 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 1299,1406:crates/oh/src/main.rs.