batch replace onButtonPressed(Button...

docs/reference/js/lessons/pong/activity.md

@@ -26,10 +26,10 @@ ball.setDirection(-45)
 The user will control the paddle by pressing ``A`` to go up and ``B`` to go down. Let's add ``on button pressed`` event handlers to do that.
 
 ```
-input.onButtonPressed("A", () => {
+input.onButtonPressed(Button.A, () => {
     paddle.changeYBy(-1)
 })
-input.onButtonPressed("B", () => {
+input.onButtonPressed(Button.B, () => {
     paddle.changeYBy(1)
 })
 ```

docs/reference/js/lessons/pong/quiz-answers.md

@@ -42,7 +42,7 @@ led.plot(ballX, ballY)
 <br/>
 
 ```
-input.onButtonPressed("A", () => {
+input.onButtonPressed(Button.A, () => {
     if (paddleNotUp()) {
         led.unplot(0, paddleY)
         paddleY = paddleY - 1
@@ -56,7 +56,7 @@ input.onButtonPressed("A", () => {
 <br/>
 
 ```
-input.onButtonPressed("A", () => {
+input.onButtonPressed(Button.A, () => {
     if (paddleNotDown()) {
         led.unplot(0, paddleY)
         paddleY = paddleY + 1