Merge pull request #803 from hckr/atob-btoa

[FIX] Error with new in btoa

snippets/btoa.md

@@ -5,7 +5,7 @@ Creates a base-64 encoded ASCII string from a String object in which each charac
 Create a `Buffer` for the given string with binary encoding and use `Buffer.toString('base64')` to return the encoded string.
 
 ```js
-const btoa = str => new Buffer.from(str, 'binary').toString('base64');
+const btoa = str => Buffer.from(str, 'binary').toString('base64');
 ```
 
 ```js