History of build 4 changes

In crates/hub/src/lib.rs, lines 41–63 on 43e8ca33bc5dd46bb381313c300bd6a9ad73d42bcae1a9cb66f44ce102248227. 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.