more doc fixes

docs/lessons/compass/activity.md

@@ -28,9 +28,8 @@ basic.forever(() => {
 If `degrees` is less than `45`, then the compass heading is mostly pointing toward North. Display `N` on the micro:bit.
 
 ```blocks
- let degrees = 0;
 basic.forever(() => {
-    degrees = input.compassHeading();
+    let degrees = input.compassHeading();
     if (degrees < 45) {
         basic.showString("N");
     }
@@ -41,9 +40,8 @@ If `degrees` is less than 135, the micro:bit is mostly pointing East. Display `E
 
 
 ```blocks
- let degrees = 0;
 basic.forever(() => {
-    degrees = input.compassHeading();
+    let degrees = input.compassHeading();
     if (degrees < 45) {
         basic.showString("N");
     }
@@ -57,9 +55,8 @@ If `degrees` is less than 225, the micro:bit is mostly pointing South. Display `
 
 
 ```blocks
- let degrees = 0;
 basic.forever(() => {
-    degrees = input.compassHeading();
+    let degrees = input.compassHeading();
     if (degrees < 45) {
         basic.showString("N");
     }
@@ -76,9 +73,8 @@ basic.forever(() => {
 If none of these conditions returned true, then the micro:bit must be pointing West. Display `W` on the micro:bit.
 
 ```blocks
- let degrees = 0;
 basic.forever(() => {
-    degrees = input.compassHeading();
+    let degrees = input.compassHeading();
     if (degrees < 45) {
         basic.showString("N");
     }

docs/lessons/digi-yoyo/activity.md

@@ -31,7 +31,7 @@ Let's add a pause. Then show the value of the the count.
 
 
 ```blocks
- let count = 0;
+let count = 0;
 while (count < 10) {
     basic.pause(100);
     basic.showNumber(count)

docs/reference/js/comment.md

@@ -38,16 +38,10 @@ This function has comments that describe the purpose of the function:
  * @param x TODO
  */
 export function square(x: number) : number {
-    let result: number
     return x * x
-    return result
 }
 ```
 
-### Formatting
-
-Use [markdown syntax](/js/markdown) to format your comments (for example, **bold** and *italic* formatting).
-
 ### Commenting out code
 
 During the debugging process, you may want to comment out a section of your code so that it doesn't run.