History of swap 1 change

In crates/flow/src/update.rs, lines 164–172 on cedd12342afac41162c56d51b436c8260d763a4a492f11a8bad6efa04094f25d. 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 164,172:crates/flow/src/update.rs.