History of propagate 2 changes

In crates/hub/src/diffusion.rs, lines 1050–1052 on 16ee5d19d22064bdc73a1e69524dada66100b0d2ae068d40f7814e1f3d5d81ba. 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 1050,1052:crates/hub/src/diffusion.rs.