try to get header correct

Author: timelyportfolio

src/transforms/filter.js

@@ -6,7 +6,6 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-
 'use strict';
 
 var isNumeric = require('fast-isnumeric');

src/transforms/groupby.js

@@ -1,3 +1,11 @@
+/**
+ * Copyright 2012-2016, Plotly, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
 'use strict';
 
 // var Lib = require('@src/lib');