History of topic::user 1 change

In crates/hub/src/events.rs, lines 59–61 on cancel-landed-runs. 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 59,61:crates/hub/src/events.rs.