Further whitespace fixes

Author: adbridge

events/include/events/Event.h

@@ -143,7 +143,7 @@ class Event<void(ArgTs...)> {
     /** Configure the period of an event
      *
      *  @param p   Period (in milliseconds) for repeatedly dispatching an event, expressed as a Chrono duration.
-     *             Period must be either non_periodic or > 0ms. If an invalid period is supplied then a 
+     *             Period must be either non_periodic or > 0ms. If an invalid period is supplied then a
      *             default non_periodic value is used.
      *             E.g. period(200ms)
      */
@@ -152,13 +152,13 @@ class Event<void(ArgTs...)> {
         if (_event) {
             if (p > duration(0)) {
                 _event->period = p;
-                
+
             } else {
                 if (p != non_periodic) {
                     MBED_WARNING(MBED_ERROR_INVALID_ARGUMENT,
                                  "Invalid period specified, defaulting to non_periodic.");
                 }
-                _event->period = non_periodic;                
+                _event->period = non_periodic;
             }
         }
     }