Fixed #10120 -- Added a `return` to a doc example, patch from andrews.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10265 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/topics/http/shortcuts.txt

@@ -76,7 +76,7 @@ This example is equivalent to::
         # View code here...
         t = loader.get_template('myapp/template.html')
         c = Context({'foo': 'bar'})
-        r = HttpResponse(t.render(c),
+        return HttpResponse(t.render(c),
             mimetype="application/xhtml+xml")
 
 ``redirect``