History of helper 1 change

In crates/flow/src/syscall.rs, lines 477–508 on e38bb032e38bad40c6499ec6191b1043dbb4f2379d7d57d58eb597e325da3d8f. 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 477,508:crates/flow/src/syscall.rs.