History of milestone 2 changes

In crates/oh/src/main.rs, lines 1472–1521 on a2ef53c5db269fa8bc86bb8abb13bb10ccba916129a301ca8738cb4829ff6680. 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 1472,1521:crates/oh/src/main.rs.