message: [docs] Add missing space to the date-io override example
diff: @@ -3,6 +3,7 @@ import DateFnsAdapter from '@material-ui/pickers/adapter/date-fns';
  import { TextField } from '@material-ui/core';
  import { DatePicker } from '@material-ui/pickers';
  import { LocalizationProvider } from '@material-ui/pickers';
  +
  class OverriddenAdapter extends DateFnsAdapter {
  getYearRange(start, end) {
  return super.getYearRange(start, end).reverse();
  