History of backfill 2 changes

In crates/hub/src/diffusion.rs, lines 193–205 on 76fdeedccf44cb715efe7f94a75a8be09b9e3d0340d4dc1dfae994301369cdd2. 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 193,205:crates/hub/src/diffusion.rs.