code format

https://github.com/alibaba/p3c/issues/107

p3c-pmd/src/main/resources/rulesets/java/ali-concurrent.xml

@@ -87,7 +87,7 @@ Positive example 3：
         .setNameFormat("demo-pool-%d").build();
     ExecutorService singleThreadPool = new ThreadPoolExecutor(1, 1,
         0L, TimeUnit.MILLISECONDS,
-    new LinkedBlockingQueue<Runnable>(1024), namedThreadFactory, new ThreadPoolExecutor.AbortPolicy());
+        new LinkedBlockingQueue<Runnable>(1024), namedThreadFactory, new ThreadPoolExecutor.AbortPolicy());
 
     singleThreadPool.execute(()-> System.out.println(Thread.currentThread().getName()));
     singleThreadPool.shutdown();