diff --git a/src/Client.php b/src/Client.php
index 2fa4864..aa4ca70 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -21,7 +21,6 @@ class Client
     
     public function __construct($server = '', $version = 'v2')
     {
-        
         $server = rtrim($server, '/');
         
         if ($server) {
@@ -44,11 +43,11 @@ public function __construct($server = '', $version = 'v2')
     /**
      * Set the default root directory. the default is `/`
      * If the root is others e.g. /linkorb when you set new key,
-     * or set dir, all of the key is under the root 
-     * e.g.  
+     * or set dir, all of the key is under the root
+     * e.g.
      * <code>
      *    $client->setRoot('/linkorb');
-     *    $client->set('key1, 'value1'); 
+     *    $client->set('key1, 'value1');
      *    // the new key is /linkorb/key1
      * </code>
      * @param string $root
@@ -163,7 +162,7 @@ public function get($key, array $flags = null)
 
     /**
      * make a new key with a given value
-     * 
+     *
      * @param string $key
      * @param string $value
      * @param int $ttl
@@ -188,7 +187,7 @@ public function mk($key, $value, $ttl = 0)
 
     /**
      * make a new directory
-     * 
+     *
      * @param string $key
      * @param int $ttl
      * @return array $body
diff --git a/src/Command/EtcdGetCommand.php b/src/Command/EtcdGetCommand.php
index 89088e9..9d688dc 100644
--- a/src/Command/EtcdGetCommand.php
+++ b/src/Command/EtcdGetCommand.php
@@ -10,7 +10,6 @@
 
 class EtcdGetCommand extends Command
 {
-
     protected function configure()
     {
         $this
diff --git a/src/Command/EtcdMkCommand.php b/src/Command/EtcdMkCommand.php
index f2adac1..ab9d7df 100644
--- a/src/Command/EtcdMkCommand.php
+++ b/src/Command/EtcdMkCommand.php
@@ -46,8 +46,5 @@ public function execute(InputInterface $input, OutputInterface $output)
 
         $json = json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
         echo $json;
-
-
-
     }
 }
diff --git a/src/Command/EtcdRequestCommand.php b/src/Command/EtcdRequestCommand.php
index 96dab53..0e4d3ca 100644
--- a/src/Command/EtcdRequestCommand.php
+++ b/src/Command/EtcdRequestCommand.php
@@ -10,7 +10,6 @@
 
 class EtcdRequestCommand extends Command
 {
-
     protected function configure()
     {
         $this
diff --git a/src/Exception/EtcdException.php b/src/Exception/EtcdException.php
index 55b796c..1d4f24a 100644
--- a/src/Exception/EtcdException.php
+++ b/src/Exception/EtcdException.php
@@ -11,5 +11,4 @@
  */
 class EtcdException extends Exception
 {
-    
 }
diff --git a/src/Exception/KeyExistsException.php b/src/Exception/KeyExistsException.php
index 5b4376b..e022aa0 100644
--- a/src/Exception/KeyExistsException.php
+++ b/src/Exception/KeyExistsException.php
@@ -9,5 +9,4 @@
  */
 class KeyExistsException extends EtcdException
 {
-    
 }
diff --git a/src/Exception/KeyNotFoundException.php b/src/Exception/KeyNotFoundException.php
index 2f50eaf..d771d29 100644
--- a/src/Exception/KeyNotFoundException.php
+++ b/src/Exception/KeyNotFoundException.php
@@ -9,5 +9,4 @@
  */
 class KeyNotFoundException extends EtcdException
 {
-    
 }
diff --git a/tests/LinkORB/Tests/Component/Etcd/ClientTest.php b/tests/LinkORB/Tests/Component/Etcd/ClientTest.php
index 6c45507..b94ab0c 100644
--- a/tests/LinkORB/Tests/Component/Etcd/ClientTest.php
+++ b/tests/LinkORB/Tests/Component/Etcd/ClientTest.php
@@ -7,7 +7,6 @@
 
 class ClientTest extends PHPUnit_Framework_TestCase
 {
-
     /**
      * @var Client
      */
@@ -20,7 +19,6 @@ protected function setUp()
         $this->client = new Client();
         $this->client->mkdir($this->dirname);
         $this->client->setRoot($this->dirname);
-        
     }
 
     protected function tearDown()