Revert "Hello world"

This reverts commit b8bbcf6.

Author: stltaylor

hello.js

@@ -1,6 +1,6 @@
 function hello() {
 	// TODO: change this string so that your program prints "Hello world!" 
-	return "Hello world!";
+	return "Hello!";
 }
 
 module.exports = hello;