Edit for markdown code visual

Author: rickerd

README.md

@@ -9,9 +9,9 @@ PHP SDK for Face++
 4. If you choose Amazon(US) server, please uncomment the 'http://apius.faceplusplus.com/v2' or 'https://apius.faceplusplus.com/v2' in line 21 - 24
 
 5. Add the API_KEY & API_SECRET to be a standard in line 27 & 28 or assign them dynamicly to your object.
-    <?php
-          $facepp = new Facepp();
-          $facepp->api_key = '{YOUR_KEY_HERE}';
-          $facepp->api_secret = '{YOUR_SECRET_HERE}';
-    ?>
-
+     
+        <?php
+            $facepp = new Facepp();
+            $facepp->api_key    = '{YOUR_KEY_HERE}';
+            $facepp->api_secret = '{YOUR_SECRET_HERE}';
+        ?>