From 9d3a3a57f27848966e40d9418f82ed8dc4dbd194 Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Mon, 17 Nov 2014 12:39:01 +1100
Subject: [PATCH] fix up generator normaliseOptions

---
 lib/6to5/generation/generator.js | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/lib/6to5/generation/generator.js b/lib/6to5/generation/generator.js
index 4db00aecf6..82fce1f967 100644
--- a/lib/6to5/generation/generator.js
+++ b/lib/6to5/generation/generator.js
@@ -35,21 +35,17 @@ _.each(Buffer.prototype, function (fn, key) {
 });
 
 CodeGenerator.normaliseOptions = function (opts) {
-  opts = opts.format || {};
-
-  opts = _.merge({
+  return _.merge({
     parentheses: true,
     semicolons: true,
-    comments: opts.comments,
+    comments: opts.comments == null || opts.comments,
     compact: false,
     indent: {
       adjustMultilineComment: true,
       style: "  ",
       base: 0
     }
-  }, opts);
-
-  return opts;
+  }, opts.format || {});
 };
 
 CodeGenerator.generators = {