fix up test styling and add use-strict declarator

test/fixtures/syntax/classes/constructor/actual.js

@@ -1,11 +1,11 @@
 class Test {
   constructor() {
-    this.state = "test";
+  this.state = "test";
   }
 }
 
 class Foo extends Bar {
   constructor() {
-    this.state = "test";
+  this.state = "test";
   }
 }

test/fixtures/syntax/classes/constructor/expected.js

@@ -1,7 +1,10 @@
-var Test = function () {
+"use strict";
+
+var Test = function() {
   var Test = function Test() {
     this.state = "test";
   };
+
   return Test;
 }();
 
@@ -21,4 +24,4 @@ var Foo = function(Bar) {
 
   Foo.__proto__ = Bar;
   return Foo;
-}(Bar);
+}(Bar);