shorten some lines in events.js

lib/events.js

@@ -1,8 +1,8 @@
-exports.EventEmitter = process.EventEmitter;
+var EventEmitter = exports.EventEmitter = process.EventEmitter;
 
 var isArray = Array.isArray;
 
-process.EventEmitter.prototype.emit = function (type) {
+EventEmitter.prototype.emit = function (type) {
   // If there is no 'error' event listener then throw.
   if (type === 'error') {
     if (!this._events || !this._events.error ||
@@ -49,9 +49,9 @@ process.EventEmitter.prototype.emit = function (type) {
   }
 };
 
-// process.EventEmitter is defined in src/node_events.cc
-// process.EventEmitter.prototype.emit() is also defined there.
-process.EventEmitter.prototype.addListener = function (type, listener) {
+// EventEmitter is defined in src/node_events.cc
+// EventEmitter.prototype.emit() is also defined there.
+EventEmitter.prototype.addListener = function (type, listener) {
   if ('function' !== typeof listener) {
     throw new Error('addListener only takes instances of Function');
   }
@@ -76,9 +76,9 @@ process.EventEmitter.prototype.addListener = function (type, listener) {
   return this;
 };
 
-process.EventEmitter.prototype.on = process.EventEmitter.prototype.addListener;
+EventEmitter.prototype.on = EventEmitter.prototype.addListener;
 
-process.EventEmitter.prototype.removeListener = function (type, listener) {
+EventEmitter.prototype.removeListener = function (type, listener) {
   if ('function' !== typeof listener) {
     throw new Error('removeListener only takes instances of Function');
   }
@@ -101,13 +101,13 @@ process.EventEmitter.prototype.removeListener = function (type, listener) {
   return this;
 };
 
-process.EventEmitter.prototype.removeAllListeners = function (type) {
+EventEmitter.prototype.removeAllListeners = function (type) {
   // does not use listeners(), so no side effect of creating _events[type]
   if (type && this._events && this._events[type]) this._events[type] = null;
   return this;
 };
 
-process.EventEmitter.prototype.listeners = function (type) {
+EventEmitter.prototype.listeners = function (type) {
   if (!this._events) this._events = {};
   if (!this._events[type]) this._events[type] = [];
   if (!isArray(this._events[type])) {