History of issue 4 changes

In crates/oh/src/main.rs, lines 759–866 on 73ef9f7671328214d75c86253d0e1094580d7cace048c6d44716d68728d58fde. 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.