History of helper 1 change

In crates/flow/src/syscall.rs, lines 484–515 on 8a6ae1e1c739dc3cf757396303c56d3f3d54949d647ac75fae8745a2f61c8ae1. 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.