History of main 2 changes

In crates/oh/src/main.rs, lines 552–569 on 2bbdc0268c23bb07c0fd0ea8922eb70e8bfa18da6bb303ec4a59e7ab5dae7fe2. 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 552,569:crates/oh/src/main.rs.