message: Hide op argument so it is not used
diff: @@ -213,7 +213,7 @@ export class FluidCollabManager extends EventEmitter implements IRichTextEditor
  this.text.on(
  "pre-op",
  - (op, local) => {
  + (_, local) => {
  if (local) {
  return;
  }
  @@ -237,7 +237,7 @@ export class FluidCollabManager extends EventEmitter implements IRichTextEditor
  this.text.on(
  "op",
  - (op, local) => {
  + (_, local) => {
  this.emit("valueChanged");
  if (local) {
  