History of issue 4 changes

In crates/oh/src/main.rs, lines 759–866 on 35fea4237cc9db585d05ea889d741c2bbd6341c6e63bd47dde6aa90884f76d06. 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.