History of run 4 changes

In crates/hub/src/backups.rs, lines 1453–1492 on c7067c7bda562389bdf8e8e005ecce14a40ce4667862d998041d41551edec507. 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 1453,1492:crates/hub/src/backups.rs.