Issue 1602 - Fixed generator syntax mistakenly applied on outer function

lib/io.js

Index: lib/io.js
===================================================================
--- a/lib/io.js
+++ b/lib/io.js
@@ -69,7 +69,7 @@
    * each line read and with a null parameter once the read operation is done.
    * The callback will be called when the operation is done.
    */
-  readFromFile: function*(/**nsIFile*/ file, /**Object*/ listener, /**Function*/ callback)
+  readFromFile: function(/**nsIFile*/ file, /**Object*/ listener, /**Function*/ callback)
   {
     try
     {
@@ -150,7 +150,7 @@
       };
 
       let decoder = new TextDecoder();
-      Task.spawn(function()
+      Task.spawn(function*()
       {
         if (firstRead && Services.vc.compare(Utils.platformVersion, "23.0a1") <= 0)
         {
@@ -194,13 +194,13 @@
    * Writes string data to a file in UTF-8 format asynchronously. The callback
    * will be called when the write operation is done.
    */
-  writeToFile: function*(/**nsIFile*/ file, /**Iterator*/ data, /**Function*/ callback)
+  writeToFile: function(/**nsIFile*/ file, /**Iterator*/ data, /**Function*/ callback)
   {
     try
     {
       let encoder = new TextEncoder();
 
-      Task.spawn(function()
+      Task.spawn(function*()
       {
         // This mimics OS.File.writeAtomic() but writes in chunks.
         let tmpPath = file.path + ".tmp";