Fixed two malformed links.

docs/intro/tutorial03.txt

@@ -277,7 +277,7 @@ you want to change the way the page looks, you'll have to edit this Python code.
 So let's use Django's template system to separate the design from Python.
 
 First, create a directory ``polls`` in your template directory you specified
-in setting:`TEMPLATE_DIRS`. Within that, create a file called ``index.html``.
+in :setting:`TEMPLATE_DIRS`. Within that, create a file called ``index.html``.
 Put the following code in that template:
 
 .. code-block:: html+django

docs/ref/contrib/messages.txt

@@ -78,7 +78,7 @@ Django provides three built-in storage classes:
 
 :class:`~django.contrib.messages.storage.fallback.FallbackStorage` is the
 default storage class. If it isn't suitable to your needs, you can select
-another storage class by setting setting:`MESSAGE_STORAGE` to its full import
+another storage class by setting :setting:`MESSAGE_STORAGE` to its full import
 path, for example::
 
     MESSAGE_STORAGE = 'django.contrib.messages.storage.cookie.CookieStorage'