History of build 4 changes

In crates/hub/src/lib.rs, lines 42–64 on 9756c67d3aec8640ec1c40e2e05a6b9d740a39e357f10c6012f749bb93a1914a. 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.