History of bench 1 change

In crates/flow/src/facts.rs, lines 46–68 on c90dd8d5fc36bc3cc6d52a0c48b4b39becc2415c97602577838bfb850ebc826f. 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 46,68:crates/flow/src/facts.rs.