message: Null guard against falsey (non-null) props.node, to make react happy
diff: @@ -182,6 +182,7 @@ export default class Quote extends React.Component {
  }
  // Deliberately render nothing if the URL isn't recognised
  - return this.props.node;
  + // in case we get an undefined/falsey node, replace it with null to make React happy
  + return this.props.node || null;
  }
  }
  