History of Bus::index 1 change

In crates/hub/src/bus.rs, lines 171–173 on v0.9.5. 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 171,173:crates/hub/src/bus.rs.