History of issue 4 changes

In crates/oh/src/main.rs, lines 930–1037 on 2abea30809ddf37d992b1ab5743b0f2b0c7daa1ddef9ecc1bd93864948816602. 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.