Fix signUrl readme and cs (GoogleCloudPlatform#869)

Author: bshaffer

cdn/README.md

@@ -5,11 +5,9 @@ The provided file includes implementation of base64url encode and decode functio
 
 ## Usage
 
-```
-
-  require_once 'signUrl.php';
-  $base64url_key = 'wpLL7f4VB9RNe_WI0BBGmA=='; // head -c 16 /dev/urandom | base64 | tr +/ -_
-  $signed_url = signUrl('https://example.com/foo', 'my-key', $base64url_key, time() + 1800);
-  echo $signed_url;
-?>
+```php
+require_once 'signUrl.php';
+$base64url_key = 'wpLL7f4VB9RNe_WI0BBGmA=='; // head -c 16 /dev/urandom | base64 | tr +/ -_
+$signed_url = signUrl('https://example.com/foo', 'my-key', $base64url_key, time() + 1800);
+echo $signed_url;
 ```

cdn/test/signUrlTest.php

@@ -17,7 +17,7 @@
 
 use PHPUnit\Framework\TestCase;
 
-require_once __DIR__."/../signUrl.php";
+require_once __DIR__ . "/../signUrl.php";
 
 class signUrlTest extends TestCase
 {
@@ -54,8 +54,7 @@ public function testSignUrl()
                   "https://www.example.com/some/path?some=query&another=param&Expires=1549751461&KeyName=my-key&Signature=sTqqGX5hUJmlRJ84koAIhWW_c3M="),
         );
 
-        foreach($cases as $c)
-        {
+        foreach ($cases as $c) {
             $this->assertEquals(sign_url($c[0], $c[1], $encoded_key, $c[2]), $c[3]);
         }
     }