Until very recently, Python’s grammar was strictly LL(1), so the parser couldn’t handle, for example, `(x, y) => x * y`. Perhaps with the move to a PEG parser,

Until very recently, Python’s grammar was strictly LL(1), so the parser couldn’t handle, for example, `(x, y) => x * y`. Perhaps with the move to a PEG parser, this syntax could now be supported?