History of issue 4 changes

In crates/oh/src/main.rs, lines 759–866 on 32d97df55ab7badadf9ae0c373eafd0009703eeee63a1d8622ce8f2acaa27dcc. 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.