message: prevent onClick toggle from double-applying
diff: @@ -14,7 +14,10 @@ export default class Details extends React.PureComponent {
  this.toggle = this.toggle.bind(this)
  }
  - toggle() {
  + toggle(event) {
  + if (event) {
  + event.preventDefault()
  + }
  this.setState({open: !this.state.open})
  }
  