Fix typos in spaces

Fix typo to fit the context

Fix typo add space

Fix small typo

Fix small typo

Fix typo

Fix typo

Fix typo

Fix typo

Fix typo

Fix typo

Fix typo

Update tail.md

Fix typo

Fix small typo

Fix typo

Fix typo

Fix typo

Fix typo

Fix small typo

Fix typo

Fix small typo

Fix typo

Fix typo

Fix typo

Fix typo

Fix typo

Fix typo

Fix typo

Fix typo

Fix typo

snippets/tail.md

@@ -2,7 +2,7 @@
 
 Returns all elements in an array except for the first one.
 
-Return `arr.slice(1)` if the array's `length` is more than `1`, otherwise return the whole array.
+Return `arr.slice(1)` if the array's `length` is more than `1`, otherwise, return the whole array.
 
 ```js
 const tail = arr => arr.length > 1 ? arr.slice(1) : arr;