History of columns 2 changes

In crates/hub/src/backups.rs, lines 970–972 on fac6853c4e46a6c9edfcb845d0fb6480cfa4f57b89ab374db1a1dd264643d689. 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 970,972:crates/hub/src/backups.rs.