History of helper 1 change

In crates/flow/src/syscall.rs, lines 484–515 on 2be1fe4ad345ad40c7ef4bccac95940da5a8809d6697cdc093e0c72b175a6baf. 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 484,515:crates/flow/src/syscall.rs.