History of mark 2 changes

In crates/hub/src/diffusion.rs, lines 107–109 on d7d182467382d2aa9551464dae4e326c45a0c0abae89114d9a24067691da852b. 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.