History of issue 2 changes

In crates/oh/src/main.rs, lines 507–577 on 745d225de3440f319d14ec371e609ef92a75aebe29802ffd110452153de41a07. 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 507,577:crates/oh/src/main.rs.