message: forgot the key
diff: @@ -11,7 +11,7 @@ export default class ProjectList extends React.Component {
  <ul>
  {this.props.projects.map(project => (
  <li>
  - <Project name = {project} />
  + <Project key = {project} name = {project} />
  </li>
  ))}
  </ul>
  