More doc fixes (#511)

* more doc fixes

* more fixes

docs/courses/csintro/arrays/activity.md

@@ -161,26 +161,25 @@ Headband Charades Complete Program (simple version - no time limit or scoring):
 let index = 0
 let arrayWords: string[] = []
 input.onGesture(Gesture.ScreenUp, () => {
-   basic.showString(arrayWords[index])
+    basic.showString(arrayWords[index])
 })
 input.onGesture(Gesture.ScreenDown, () => {
-   led.stopAnimation()
-   basic.clearScreen()
-   if (index < arrayWords.length - 1) {
-       index += 1
-   } else {
-       game.gameOver()
-   }
+    led.stopAnimation()
+    basic.clearScreen()
+    if (index < arrayWords.length - 1) {
+        index += 1
+    } else {
+        game.gameOver()
+    }
 })
 arrayWords = ["cat", "guitar", "flashlight", "cupcake", "tree", "frisbee"]
 index = 0
 basic.showLeds(`
-   . # # # .
-   . . . # .
-   . . # # .
-   . . . . .
-   . . # . .
-   `)
+    . # # # .
+    . . . # .
+    . . # # .
+    . . . . .
+    . . # . .`)
 basic.pause(100)
 basic.showNumber(3)
 basic.pause(100)