Update installation.md

docs/installation.md

@@ -37,8 +37,7 @@ And add the following methods to support registration:
 
 ```objective-c
 
-- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken
-{
+- (void)application:(UIApplication *)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData *)deviceToken {
   [RNNotifications didRegisterForRemoteNotificationsWithDeviceToken:deviceToken];
 }