History of issue 4 changes

In crates/oh/src/main.rs, lines 785–892 on 244724133fedb94ae25b96dea27e95115c271a8e47c09f52dca574dd9fd5eee1. 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 785,892:crates/oh/src/main.rs.