History of hub 3 changes

In crates/hub/tests/proposals.rs, lines 38–55 on diffusion-pin-bookmark. 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 38,55:crates/hub/tests/proposals.rs.