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.

Start with the functional-components section at reactjs.org/tutorial/tutorial.html#functional-components and review the quoted note alongside the class-component example. Revise the note so it does not imply that onClick={this.props.onClick} cannot work in a class component; done means the explanation is accurate and still clearly describes the shorter functional-component form.