History of milestone 2 changes

In crates/oh/src/main.rs, lines 1434–1483 on close-proposal-140. 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 1434,1483:crates/oh/src/main.rs.