Merge pull request #406 from autokagami/generic-sensor

Editorial: Align with Web IDL specification

Author: reillyeon

index.bs

@@ -933,8 +933,8 @@ interface Sensor : EventTarget {
   readonly attribute boolean activated;
   readonly attribute boolean hasReading;
   readonly attribute DOMHighResTimeStamp? timestamp;
-  void start();
-  void stop();
+  undefined start();
+  undefined stop();
   attribute EventHandler onreading;
   attribute EventHandler onactivate;
   attribute EventHandler onerror;