fix up comments option

lib/6to5/file.js

@@ -29,11 +29,11 @@ File.normaliseOptions = function (opts) {
     blacklist:  [],
     whitelist:  [],
     sourceMap:  false,
+    comments:   true,
     filename:   "unknown",
     modules:    "common",
     runtime:    false,
-    code:       true,
-    comments:   true
+    code:       true
   });
 
   // normalise windows path separators to unix

lib/6to5/generation/generator.js

@@ -17,11 +17,10 @@ var _          = require("lodash");
 function CodeGenerator(ast, opts, code) {
   opts = opts || {};
 
-  this.keepComments = opts.comments !== false;
-  this.comments     = ast.comments || [];
-  this.tokens       = ast.tokens || [];
-  this.format       = CodeGenerator.normaliseOptions(opts);
-  this.ast          = ast;
+  this.comments = ast.comments || [];
+  this.tokens   = ast.tokens || [];
+  this.format   = CodeGenerator.normaliseOptions(opts);
+  this.ast      = ast;
 
   this.whitespace = new Whitespace(this.tokens, this.comments);
   this.position   = new Position;
@@ -41,7 +40,7 @@ CodeGenerator.normaliseOptions = function (opts) {
   opts = _.merge({
     parentheses: true,
     semicolons: true,
-    comments: true,
+    comments: opts.comments,
     compact: false,
     indent: {
       adjustMultilineComment: true,
@@ -142,10 +141,7 @@ CodeGenerator.prototype.print = function (node, parent, opts) {
   };
 
   if (this[node.type]) {
-
-    if(this.keepComments) {
-      this.printLeadingComments(node, parent);
-    }
+    this.printLeadingComments(node, parent);
 
     newline(true);
 
@@ -166,9 +162,7 @@ CodeGenerator.prototype.print = function (node, parent, opts) {
 
     newline(false);
 
-    if(this.keepComments) {
-      this.printTrailingComments(node, parent);
-    }
+    this.printTrailingComments(node, parent);
   } else {
     throw new ReferenceError("unknown node " + node.type + " " + JSON.stringify(node));
   }