Add state_with_unit info

source/_docs/configuration/templating.markdown

@@ -85,10 +85,15 @@ Home Assistant adds extensions to allow templates to access all of the current s
 
 [strp-format]: https://docs.python.org/3.4/library/datetime.html#strftime-and-strptime-behavior
 
-<p class='note warning'>
+<p class='note'>
 If your template uses an `entity_id` that begins with a number (example: `states.device_tracker.2008_gmc`) you must use a bracket syntax to avoid errors caused by rendering the `entity_id` improperly. In the example given, the correct syntax for the device tracker would be: `states.device_tracker['2008_gmc']`
 </p>
 
+## {% linkable_title Home Assistant template extensions %}
+
+In templates, besides the normal [state object methods and properties](/topics/state_object/), there are also some extra things available:
+
+- `states.sensor.temperature.state_with_unit` will print the state of the entity and, if available, the unit.
 
 ## {% linkable_title Examples %}