events: - line nodejs#354 - "iff" changed to "if and only if".

lib/events.js

@@ -351,7 +351,7 @@ EventEmitter.prototype.prependOnceListener =
       return this;
     };
 
-// emits a 'removeListener' event if the listener was removed
+// emits a 'removeListener' event if and only if the listener was removed
 EventEmitter.prototype.removeListener =
     function removeListener(type, listener) {
       var list, events, position, i, originalListener;