snake_case -> camelCase in docs

docs/lessons/bop-it/activity.md

@@ -41,7 +41,7 @@ Now let's add some more types of instructions for the player to follow. Let's ad
 /**
  * {highlight}
  */
-export function newAction_() {
+export function newAction() {
     action = Math.random(4) // ***
     if (action == 0) {
         basic.showString("PUSH A", 150) // ***

docs/lessons/speed-button/quiz-answers.md

@@ -21,10 +21,10 @@ let count = 0
 ## 3. If the rectangle below represents the BBC micro:bit, shade the areas that will be displayed after two button presses on Button A. Explain why that particular area is shaded.
 
 ```blocks
-let count_ = 0
+let count = 0
 input.onButtonPressed(Button.A, () => {
-    count_ = count_ + 1
-    basic.showNumber(count_, 100)
+    count = count + 1
+    basic.showNumber(count, 100)
 })
 ```
 
@@ -37,10 +37,10 @@ After two button presses, **count** will be equal to 2.
 ## 5. If the rectangle below represents the BBC micro:bit, shade the areas that will be displayed after five button presses on Button A. Explain why that particular area is shaded.
 
 ```blocks
-let count_ = 0
+let count = 0
 input.onButtonPressed(Button.A, () => {
-    count_ = count_ + 1
-    basic.showNumber(count_, 100)
+    count = count + 1
+    basic.showNumber(count, 100)
 })
 ```
 

docs/lessons/speed-button/quiz.md

@@ -23,10 +23,10 @@ let count = 0
 ## 3. Draw which LED is ON after running this code and pressing Button A twice. Explain why you chose to draw that number 
 
 ```blocks
-let count_ = 0
+let count = 0
 input.onButtonPressed(Button.A, () => {
-    count_ = count_ + 1
-    basic.showNumber(count_, 100)
+    count = count + 1
+    basic.showNumber(count, 100)
 })
 ```
 
@@ -37,10 +37,10 @@ input.onButtonPressed(Button.A, () => {
 ## 4. Draw which LED is ON after running this code and pressing Button A five times. Explain why you chose to draw that number.
 
 ```blocks
-let count_ = 0
+let count = 0
 input.onButtonPressed(Button.A, () => {
-    count_ = count_ + 1
-    basic.showNumber(count_, 100)
+    count = count + 1
+    basic.showNumber(count, 100)
 })
 ```
 

docs/lessons/zoomer/quiz-answers.md

@@ -15,7 +15,7 @@ Write the line of code to measure the acceleration and then store in it a variab
 <br/>
 
 ```blocks
-let accX_ = input.acceleration("x")
+let accX = input.acceleration("x")
 ```
 
 Note: acceleration does not have be measured in the "x" direction. It can also be in the "y" or "z" direction.