Mark configuration as example

source/_components/binary_sensor.nx584.markdown

@@ -20,6 +20,7 @@ Enabling this sensor platform exposes all of your zones as binary sensors, which
 To enable this, add the following lines to your `configuration.yaml`:
 
 ```yaml
+# Example configuration.yaml entry
 binary_sensor:
   platform: nx584
   host: ADDRESS

source/_components/climate.knx.markdown

@@ -21,6 +21,7 @@ KNX thermostats use at least 2 group addresses: one for the current temperature
 To use your KNX thermostats in your installation, add the following to your `configuration.yaml` file:
 
 ```yaml
+# Example configuration.yaml entry
 climate:
   - platform: knx
     name: KNX Thermostat

source/_components/ecobee.markdown

@@ -45,6 +45,7 @@ Once you enter the PIN on the ecobee site, wait approximately 5 minutes and then
 To set it up, add the following information to your `configuration.yaml` file:
 
 ```yaml
+# Example configuration.yaml entry
 ecobee:
   api_key: asdfghjklqwertyuiopzxcvbnm 
   hold_temp: True

source/_components/knx.markdown

@@ -24,6 +24,7 @@ There is currently support for the following device types within Home Assistant:
 A `knx` section must be present in the `configuration.yaml` file and contain the following options as required:
 
 ```yaml
+# Example configuration.yaml entry
 knx:
   host: IP_ADDRESS
   port: PORT

source/_components/switch.knx.markdown

@@ -19,6 +19,7 @@ The `knx` switch component is used as in interface to switching actuators.
 To use your KNX switch in your installation, add the following to your `configuration.yaml` file:
 
 ```yaml
+# Example configuration.yaml entry
 switch:
   - platform: knx
     name: KNX Switch