History of build 4 changes

In crates/hub/src/lib.rs, lines 41–63 on 5e9dbc57bc31cfc0e9c39e910f5983bb0760ea5027199a71a71e563e6354045b. 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 41,63:crates/hub/src/lib.rs.