History of propose 7 changes

In crates/hub/src/diffusion.rs, lines 884–1012 on a549ddd5941ffe53cfa2efc116cf480e103dcf71b7ff693631ee529601089d74. 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 884,1012:crates/hub/src/diffusion.rs.