History of mib 2 changes

In crates/hub/src/flow.rs, lines 933–939 on close-proposal-140. 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 933,939:crates/hub/src/flow.rs.