Line wrap was causing formatting shenaigans (#666)

There were a ton of trailing spaces at the end of some of the YAML definitions which caused the resulting output to look rather ugly.

source/_components/group.markdown

@@ -64,7 +64,9 @@ Notice in the example below that in order to refer to the group "Living Room", y
     entities:
       - light.light_family_1
       - binary_sensor.motion_living
+
   Bedroom: light.light_bedroom, switch.sleeping
+
   Rooms:
     view: yes                                 
     name: Rooms