Misleading note in the tutorial

This note from the tutorial: reactjs.org/tutorial/tutorial.html#functional-components

Note
When we modified the Square to be a functional component, we also changed onClick={() => this.props.onClick()} to a shorter onClick={props.onClick} (note the lack of parentheses on both sides). In a class, we used an arrow function to access the correct this value, but in a functional component we don’t need to worry about this.

The note seems to suggest that onClick={this.props.onClick} wouldn't work in a class component, but that's false.

从 reactjs.org/tutorial/tutorial.html#functional-components 中的函数组件部分开始，并检查类组件示例旁边引用的注释。修改该注释，使其不再暗示 onClick={this.props.onClick} 无法在类组件中工作；完成的标准是解释准确，并且仍然清楚地描述函数组件更简短的形式。