History of Done::fmt 1 change

In crates/hub/src/maintenance.rs, lines 19–21 on 3776b70d9b1732b154af056951f3709461d06c90ab9bc0a868da243d9386b890. 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 19,21:crates/hub/src/maintenance.rs.