better classes, more spec compliant and nicer output - fixes #952

test/fixtures/transformation/es6-classes/instance-method/expected.js

@@ -1,16 +1,16 @@
 "use strict";
 
 var Test = (function () {
-  function Test() {
-    babelHelpers.classCallCheck(this, Test);
-  }
+  var _Test = function Test() {
+    babelHelpers.classCallCheck(this, _Test);
+  };
 
-  babelHelpers.createClass(Test, {
+  babelHelpers.createClass(_Test, {
     test: {
       value: function test() {
         return 5 + 5;
       }
     }
   });
-  return Test;
+  return _Test;
 })();