Prettier fixes

lib/util/clone.js

@@ -1,13 +1,13 @@
 module.exports = function(obj) {
   /* istanbul ignore if */
   if (null === obj || "object" !== typeof obj) {
-    return obj
+    return obj;
   }
-  var copy = obj.constructor()
+  var copy = obj.constructor();
   for (var attr in obj) {
     if (obj.hasOwnProperty(attr)) {
-      copy[attr] = obj[attr]
+      copy[attr] = obj[attr];
     }
   }
-  return copy
-}
+  return copy;
+};