History of build 6 changes

In crates/hub/src/lib.rs, lines 45–69 on 739a763a558c04cb6e59e66ed47efa071fa5e97b75c38648dfd040da6c249098. 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 45,69:crates/hub/src/lib.rs.