History of issue 4 changes

In crates/oh/src/main.rs, lines 759–866 on df5c69cbd047129e97727224870f5c9b49f5d634eccb37639188fc7d739906d4. 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 759,866:crates/oh/src/main.rs.