History of kernel 1 change

In crates/flow/src/facts.rs, lines 40–42 on 4dd392d16454f997a30b1e111f470747123aeb813fac7d6bcaacf2c280e14ccc. 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 40,42:crates/flow/src/facts.rs.