fix duplicate comments on property key shorthands - fixes #234

lib/6to5/transformation/transformers/es6-property-name-shorthand.js

@@ -1,4 +1,8 @@
+var t = require("../../types");
+var _ = require("lodash");
+
 exports.Property = function (node) {
   if (!node.shorthand) return;
   node.shorthand = false;
+  node.key = t.removeComments(_.clone(node.key));
 };

lib/6to5/types/index.js

@@ -295,11 +295,6 @@ t.inheritsComments = function (child, parent) {
   return child;
 };
 
-t.removeComments = function (node) {
-  delete node.leadingComments;
-  delete node.trailingComments;
-};
-
 t.inherits = function (child, parent) {
   child.loc   = parent.loc;
   child.end   = parent.end;