small changes after code review

docs/messages.md

@@ -36,7 +36,7 @@ For advanced usage, you can also customize which constructor is used for Block a
 var messages = new Messages({Block: MyBlock, Transaction: MyTransaction});
 ```
 
-And additionally custom network:
+And additionally a custom network:
 
 ```javascript
 var messages = new Messages({network: Networks.testnet});

lib/messages/message.js

@@ -2,7 +2,6 @@
 
 var bitcore = require('bitcore');
 var $ = bitcore.util.preconditions;
-var Networks = bitcore.Networks;
 var BufferWriter = bitcore.encoding.BufferWriter;
 var Hash = bitcore.crypto.Hash;
 
@@ -16,7 +15,7 @@ var Hash = bitcore.crypto.Hash;
  */
 function Message(options) {
   this.command = options.command;
-  this.network = options.network || Networks.defaultNetwork;
+  this.network = options.network;
 }
 
 /**

test/messages/message.js

@@ -3,6 +3,7 @@
 var should = require('chai').should();
 var P2P = require('../../');
 var Message = P2P.Messages.Message;
+var Networks = require('bitcore').Networks;
 
 describe('Message', function() {
 
@@ -23,7 +24,8 @@ describe('Message', function() {
   describe('#toBuffer', function() {
     it('serialize to a buffer', function() {
       var message = new Message({
-        command: 'command'
+        command: 'command',
+        network: Networks.defaultNetwork
       });
       message.getPayload = function() {
         return new Buffer(0);