History of issue 4 changes

In crates/oh/src/main.rs, lines 785–892 on 5d90e0e045e2765ec3216fdc770fe79882c0f8460dc4fe9cf573eadecec94b14. 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.