History of main 2 changes

In crates/oh/src/main.rs, lines 552–569 on d9b3b84605a4f30f778d73011e379e8178f33d8d2c6d3d6704c7f5f7e108d5f7. 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.