Remove .html extension from links

chrome/common/extensions/docs/templates/articles/messaging.html

 <h1>Message Passing</h1>
 
 
 <p>
 Since content scripts run in the context of a web page and not the extension,
 they often need some way of communicating with the rest of the extension. For
 example, an RSS reader extension might use content scripts to detect the
 presence of an RSS feed on a page, then notify the background page in order to
 display a page action icon for that page.
 
@@ skipping 29 matching lines @@
 <pre data-filename="contentscript.js">
 chrome.runtime.sendMessage({greeting: "hello"}, function(response) {
   console.log(response.farewell);
 });
 </pre>
 
 <p>
 Sending a request from the extension to a content script looks very similar,
 except that you need to specify which tab to send it to. This example
 demonstrates sending a message to the content script in the selected tab.
-<pre data-filename="background.html">
+<pre data-filename="background">
 chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
   chrome.tabs.sendMessage(tabs[0].id, {greeting: "hello"}, function(response) {
     console.log(response.farewell);
   });
 });
 </pre>
 
 <p>
 On the receiving end, you need to set up an
 $(ref:runtime.onMessage)
@@ skipping 390 matching lines @@
 <a href="http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/api/messaging/">examples/api/messaging</a>
 directory.
 <a href="http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/api/nativeMessaging/">examples/api/nativeMessaging</a>
 contains an example application that uses native messaging.
 Also see the
 <a href="http://src.chromium.org/viewvc/chrome/trunk/src/chrome/common/extensions/docs/examples/howto/contentscript_xhr">contentscript_xhr</a> example,
 in which a content script and its parent extension exchange messages,
 so that the parent extension can perform
 cross-site requests on behalf of the content script.
 For more examples and for help in viewing the source code, see
-<a href="samples.html">Samples</a>.
+<a href="samples">Samples</a>.
 </p>