message: update and improve comments
diff: @@ -24,14 +24,14 @@ import {MatrixEvent} from 'matrix-js-sdk';
  import {makeUserPermalink} from "../../../matrix-to";
  import SettingsStore from "../../../settings/SettingsStore";
  -// This component does no cycle detection, simply because the only way to make such a cycle
  -// would be to craft event_id's, using a custom homeserver; even then the impact would be low
  -// as each event being loaded (after the first) is triggered by an explicit user action.
  +// This component does no cycle detection, simply because the only way to make such a cycle would be to
  +// craft event_id's, using a homeserver that generates predictable event IDs; even then the impact would
  +// be low as each event being loaded (after the first) is triggered by an explicit user action.
  export default class Reply extends React.Component {
  static propTypes = {
  - // The parent event
  + // the latest event in this chain of replies
  parentEv: PropTypes.instanceOf(MatrixEvent),
  -
  + // called when the preview's contents has loaded
  onWidgetLoad: PropTypes.func.isRequired,
  };
  