History of build 4 changes

In crates/hub/src/lib.rs, lines 42–64 on 08057ce15e7775b2023d8be10c8add11f6f575d4a5134157db6c639a65d9985b. 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 42,64:crates/hub/src/lib.rs.