Fix whitespace issues

Change-Id: I7c96843996f4847f9e15022f1dc6cd85e8a092f7
diff --git a/TestON/lib/pox/core.py b/TestON/lib/pox/core.py
index 8b31e7a..dc8cab6 100644
--- a/TestON/lib/pox/core.py
+++ b/TestON/lib/pox/core.py
@@ -306,26 +306,26 @@
       log.warn("Warning: Registered '%s' multipled times" % (name,))
     self.components[name] = component
     self.raiseEventNoErrors(ComponentRegistered, name, component)
-    
+
   def listenToDependencies(self, sink, components):
     """
     If a component depends on having other components
-    registered with core before it can boot, it can use this method to 
+    registered with core before it can boot, it can use this method to
     check for registration, and listen to events on those dependencies.
-    
+
     Note that event handlers named with the _handle* pattern in the sink must
     include the name of the desired source as a prefix. For example, if topology is a
     dependency, a handler for topology's SwitchJoin event must be labeled:
        def _handle_topology_SwitchJoin(...)
-    
+
     sink - the component waiting on dependencies
     components - a list of dependent component names
-    
+
     Returns whether all of the desired components are registered.
     """
     if components == None or len(components) == 0:
       return True
-  
+
     got = set()
     for c in components:
       if self.hasComponent(c):