Fix some formatting in the sensor document.

Make it easier to read in plain text.

Change-Id: I5961e88b84096fbfac5850bb511850107a9a5b04
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/sensor-architecture.md b/sensor-architecture.md
index b643c09..b640605 100644
--- a/sensor-architecture.md
+++ b/sensor-architecture.md
@@ -18,12 +18,11 @@
 
 **Path definitions**
 
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**\<type>** :
-The [HWMon class][2] name in lower case.
-Examples include `temperature, fan_tach, voltage`.
+* **<type\>** : The [HWMon class][2] name in lower case.
+    - Examples include `temperature, fan_tach, voltage`.
 
-&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**\<label>** : User defined
-name of the sensor.  Examples include `ambient, cpu0, fan5`
+* **<label\>** : User defined name of the sensor.
+    - Examples include `ambient, cpu0, fan5`
 
 **Note**: The label shall comply with "Valid Object Paths" of [D-Bus Spec][3],
 that shall only contain the ASCII characters "[A-Z][a-z][0-9]_".