Makes notes for settings module more visible (#2826)

docs/reference/contrib/settings.rst

@@ -118,7 +118,7 @@ Then access the settings through ``{{ settings }}``:
 
     {{ settings.app_label.SocialMediaSettings.instagram }}
 
-(Replace ``app_label`` with the label of the app containing your settings model.)
+.. note:: Replace ``app_label`` with the label of the app containing your settings model.
 
 If you are not in a ``RequestContext``, then context processors will not have run, and the ``settings`` variable will not be availble. To get the ``settings``, use the provided ``{% get_settings %}`` template tag. If a ``request`` is in the template context, but for some reason it is not a ``RequestContext``, just use ``{% get_settings %}``:
 
@@ -168,7 +168,7 @@ Then access the settings through the ``settings()`` template function:
 
     {{ settings("app_label.SocialMediaSettings").twitter }}
 
-(Replace ``app_label`` with the label of the app containing your settings model.)
+.. note:: Replace ``app_label`` with the label of the app containing your settings model.
 
 This will look for a ``request`` variable in the template context, and find the correct site to use from that. If for some reason you do not have a ``request`` available, you can instead use the settings defined for the default site: