Removed replacing double- with single-quotes in app.info generation. Resolves #40.

tests/test_app_tts_output/app.info.js

Index: tests/test_app_tts_output/app.info.js
diff --git a/tests/test_app_tts_output/app.info.js b/tests/test_app_tts_output/app.info.js
index 903030f8db196a6f5d0a452cefee2840f509040d..3ddb435505a7f5a8eb92a1ed134d0236d6898009 100644
--- a/tests/test_app_tts_output/app.info.js
+++ b/tests/test_app_tts_output/app.info.js
@@ -1,20 +1,20 @@
 // TODO(Caterpillar): Check usage of caterpillar.manifest.
 chrome.caterpillar.manifest = {
-  'app': {
-    'background': {
-      'scripts': [
-        '\ud835\udcfc\ud835\udcec\ud835\udcfb\ud835\udcf2\ud835\udcf9\ud835\udcfd\ud835\udcfc/main.js'
+  "app": {
+    "background": {
+      "scripts": [
+        "\ud835\udcfc\ud835\udcec\ud835\udcfb\ud835\udcf2\ud835\udcf9\ud835\udcfd\ud835\udcfc/main.js"
       ]
     }
   },
-  'icons': {
-    '128': '\ud83d\udcfc\\c/icon_big.png',
-    '64': '\ud83d\udcfc\\c/icon_small.png'
+  "icons": {
+    "128": "\ud83d\udcfc\\c/icon_big.png",
+    "64": "\ud83d\udcfc\\c/icon_small.png"
   },
-  'manifest_version': 2,
-  'name': 'Text-to-Speech Chrome App',
-  'permissions': [
-    'tts'
+  "manifest_version": 2,
+  "name": "Text-to-Speech Chrome App",
+  "permissions": [
+    "tts"
   ],
-  'version': '1.0.0'
+  "version": "1.0.0"
 };