History of helper 1 change

In crates/flow/src/syscall.rs, lines 484–515 on 3b1e6c8448ca3058801d6c6a7e374add6d0dfcc9dec82c727a79e8394f9b272f. 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.