Small documentation change

sys/brathuhn.py

@@ -303,8 +303,11 @@ def callAt(func,_time,*args):
     in the same thread, so no synchronization is needed. You can append any 
     number of arguments you need. Returns the call id, needed to cancel a call
     
+	E.g this will call foo(arg1,arg2) in ~5 seconds
+        brathuhn.callAt(foo,time.time()+5,arg1,arg2)
+	
     @param func -- Function to be called
-    @param time -- Message body"""
+    @param time -- The time when the message will be called"""
 	global call_ats
 	global call_ats_id
 	call_ats[call_ats_id]=[func,_time,args]