diff --git a/app/src/main/java/io/legado/app/ui/book/source/manage/BookSourceActivity.kt b/app/src/main/java/io/legado/app/ui/book/source/manage/BookSourceActivity.kt
index 81364c11e..258e8b52d 100644
--- a/app/src/main/java/io/legado/app/ui/book/source/manage/BookSourceActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/source/manage/BookSourceActivity.kt
@@ -135,9 +135,8 @@ class BookSourceActivity : VMBaseActivity<BookSourceViewModel>(R.layout.activity
         }
         bookSourceLiveDate?.observe(this, Observer {
             search_view.queryHint = getString(R.string.search_book_source_num, it.size)
-            val diffResult = DiffUtil.calculateDiff(
-                DiffCallBack(adapter.getItems(), it)
-            )
+            val diffResult = DiffUtil
+                .calculateDiff(DiffCallBack(adapter.getItems(), it))
             adapter.setItemsNoNotify(it)
             diffResult.dispatchUpdatesTo(adapter)
         })
diff --git a/app/src/main/java/io/legado/app/ui/rss/source/manage/RssSourceActivity.kt b/app/src/main/java/io/legado/app/ui/rss/source/manage/RssSourceActivity.kt
index 09eb27e39..0a2c2f0bd 100644
--- a/app/src/main/java/io/legado/app/ui/rss/source/manage/RssSourceActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/rss/source/manage/RssSourceActivity.kt
@@ -91,9 +91,8 @@ class RssSourceActivity : VMBaseActivity<RssSourceViewModel>(R.layout.activity_r
         sourceLiveData?.removeObservers(this)
         sourceLiveData = App.db.rssSourceDao().liveAll()
         sourceLiveData?.observe(this, Observer {
-            val diffResult = DiffUtil.calculateDiff(
-                DiffCallBack(adapter.getItems(), it)
-            )
+            val diffResult = DiffUtil
+                .calculateDiff(DiffCallBack(adapter.getItems(), it))
             adapter.setItemsNoNotify(it)
             diffResult.dispatchUpdatesTo(adapter)
         })