History of proposal 6 changes

In crates/oh/src/main.rs, lines 919–1056 on dc59d1b56c3d2fe90077436d3acd62ff41bca271ff043b6c6ddbc69ba54aaa19. 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 919,1056:crates/oh/src/main.rs.