message: Fix generation of commas
diff: @@ -438,7 +438,7 @@ export default class Generator {
  opts.iterator(node, i);
  }
  - const isLastNode = i === nodes.length - 1;
  + const isLastNode = i === interleavedNodes.length - 1;
  if (opts.separator && !isLastNode) {
  opts.separator(this);
  }
  