update snippets 1-15

snippets/arrayLcm.md

@@ -7,9 +7,12 @@ Use `Array.reduce()` and the `lcm` formula (uses recursion) to calculate the low
 ```js
 const arrayLcm = arr =>{
   const gcd = (x, y) => !y ? x : gcd(y, x % y);
-  const lcm = (x, y) => (x*y)/gcd(x, y); 
+  const lcm = (x, y) => (x*y)/gcd(x, y);
   return arr.reduce((a,b) => lcm(a,b));
 }
-// arrayLcm([1,2,3,4,5]) -> 60
-// arrayLcm([4,8,12]) -> 24
+```
+
+```js
+arrayLcm([1,2,3,4,5]) -> 60
+arrayLcm([4,8,12]) -> 24
 ```