History of propose 6 changes

In crates/hub/src/diffusion.rs, lines 685–798 on f4d6ef418a96aef348f721e3a7eaede7f21a77e79dc0c0c9681edf895e219864. 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 685,798:crates/hub/src/diffusion.rs.