History of proposal 10 changes

In crates/oh/src/main.rs, lines 1573–1739 on 42c77f6515c2cecf3b98ba6310feab38c362e69955388d8ec4d4618886d1ef05. 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 1573,1739:crates/oh/src/main.rs.