message: (docs) - correct invalid syntax in getting started
diff: @@ -236,12 +236,11 @@ const addTodo = `
  class TodoForm extends Component {
  state = {
  - error: null
  + error: null,
  };
  add = () => {
  - this.props.addTodo({ text: 'something!' })
  - .catch(error => {
  + this.props.addTodo({ text: 'something!' }).catch(error => {
  this.setState({ error });
  });
  };
  @@ -251,13 +250,13 @@ class TodoForm extends Component {
  return 'Oh no!';
  }
  - return <button onClick={this.add}>Add something!</button>
  + return <button onClick={this.add}>Add something!</button>;
  }
  }
  const WithMutation = () => (
  <Mutation query={addTodo}>
  - {({ executeMutation }) => <TodoForm addTodo={executeMutation} />
  + {({ executeMutation }) => <TodoForm addTodo={executeMutation} />}
  </Mutation>
  );
  ```
  @@ -291,7 +290,7 @@ class TodoForm extends Component {
  const WithMutation = () => (
  <Mutation query={addTodo}>
  - {({ error, executeMutation }) => <TodoForm error={error} addTodo={executeMutation} />
  + {({ error, executeMutation }) => <TodoForm error={error} addTodo={executeMutation} />}
  </Mutation>
  );
  ```
  