History of Io::note 1 change

In crates/flow/src/wasm.rs, lines 401–408 on v0.5.3. 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 401,408:crates/flow/src/wasm.rs.