History of supersede 3 changes

In crates/hub/src/flow.rs, lines 556–564 on 50928fab5ffc9cc83dbf663120be66957b234ce9b26b674587fe66b356ca003e. 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 556,564:crates/hub/src/flow.rs.