History of main 2 changes

In crates/oh/src/main.rs, lines 564–581 on dc71378db1dc95169f80a85c58c80bc86dbd44546a90607b3a49297ec2e1843e. 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 564,581:crates/oh/src/main.rs.