History of build 4 changes

In crates/hub/src/lib.rs, lines 41–63 on fd958fbc06fb6d650412b0d8ae3e418198830aadedb8cd462582bb958f9a73de. 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.