History of mark 2 changes

In crates/hub/src/diffusion.rs, lines 107–109 on 61ecbd299f22db4f8ed79fb1e3cc558994a8ac49e7f2315d576e0e1cf1fab587. 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 107,109:crates/hub/src/diffusion.rs.