message: Tweak comment about field ID
diff: @@ -19,7 +19,7 @@ import PropTypes from 'prop-types';
  export default class Field extends React.PureComponent {
  static propTypes = {
  - // The field's id, which binds the input and label together.
  + // The field's ID, which binds the input and label together.
  id: PropTypes.string.isRequired,
  // The field's <input> type. Defaults to "text".
  type: PropTypes.string,
  