History of write 1 change

In crates/hub/tests/maintenance.rs, lines 19–23 on v0.9.20. 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 19,23:crates/hub/tests/maintenance.rs.