fix comment format

Author: shuwenwei

iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/compaction/execute/utils/CompactionUtils.java

@@ -586,8 +586,7 @@ private static void recursiveTTLCheckForTableDir(
       return;
     }
     // The rate limit may only work on filesystems like ext4, directory File.length() is
-    // block-aligned
-    // and reflects allocated directory entry blocks.
+    // block-aligned and reflects allocated directory entry blocks.
     acquireCompactionReadRate(currentFile.length());
     for (File child : children) {
       recursiveTTLCheckForTableDir(