History of issue 4 changes

In crates/oh/src/main.rs, lines 759–866 on 1c8276b903141bd49f9b744e8c2e41d7e5c4a58c3208a0866714da894b79528a. 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.