History of issue 4 changes

In crates/oh/src/main.rs, lines 930–1037 on a0a1601eb5a532d59ffadb89cbe957a7459cca6c44707a8d60aa4e63698b43e9. 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 930,1037:crates/oh/src/main.rs.