History of run 4 changes

In crates/hub/src/backups.rs, lines 1471–1510 on v0.6.1. 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 1471,1510:crates/hub/src/backups.rs.