History of build 4 changes

In crates/hub/src/lib.rs, lines 42–64 on 92574625ee9a138389317f97fa256f8decc8fe461c153b7de9fbb45daeed47d4. 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.