Fix incorrect manifest JSON in the chrome.downloads intro.

chrome/common/extensions/docs/templates/intros/downloads.html

Index: chrome/common/extensions/docs/templates/intros/downloads.html
diff --git a/chrome/common/extensions/docs/templates/intros/downloads.html b/chrome/common/extensions/docs/templates/intros/downloads.html
index 84582dd734e3bbb9855f2ad096b6889fa964b38d..9a52ba02349bb6a0682ae00c35d0b9658c6ca1db 100644
--- a/chrome/common/extensions/docs/templates/intros/downloads.html
+++ b/chrome/common/extensions/docs/templates/intros/downloads.html
@@ -1,18 +1,20 @@
 <h2 id='manifest'>Manifest</h2>
 
-<p> You must declare the 'downloads' permission in the <a
+<p> You must declare the <code>"downloads"</code> permission in the <a
 href='manifest.html'>extension manifest</a> to use this API.</p>
 
 <pre>{
-  'name': 'My extension',
+  "name": "My extension",
   ...
-<b>  'permissions': ['downloads']</b>,
+  <b>"permissions": [
+    "downloads"
+  ]</b>,
   ...
 }</pre>
 
 <h2 id='examples'>Examples</h2>
 
-<p>You can find simple examples of using the downloads module in the <a
+<p>You can find simple examples of using the <code>chrome.downloads</code> API in the <a
 href='http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/api/downloads/'>examples/api/downloads</a>
 directory. For other examples and for help in viewing the source code, see <a
 href='samples.html'>Samples</a>.</p>