Update to Drupal 8.1.2. For more information, see https://www.drupal.org/project/drupal/releases/8.1.2

core/modules/aggregator/tests/modules/aggregator_test/src/Plugin/aggregator/fetcher/TestFetcher.php

@@ -28,4 +28,5 @@ class TestFetcher extends DefaultFetcher implements FetcherInterface {
     }
     return parent::fetch($feed);
   }
+
 }

core/modules/aggregator/tests/modules/aggregator_test/src/Plugin/aggregator/parser/TestParser.php

@@ -27,4 +27,5 @@ class TestParser extends DefaultParser implements ParserInterface {
   public function parse(FeedInterface $feed) {
     return parent::parse($feed);
   }
+
 }

core/modules/aggregator/tests/src/Kernel/AggregatorTitleTest.php

@@ -43,7 +43,7 @@ class AggregatorTitleTest extends KernelTestBase {
     $this->fieldName = 'title';
   }
 
-  /*
+  /**
    * Tests the formatter output.
    */
   public function testStringFormatter() {

core/modules/aggregator/tests/src/Kernel/Migrate/d6/MigrateAggregatorFeedTest.php

@@ -44,4 +44,5 @@ class MigrateAggregatorFeedTest extends MigrateDrupal6TestBase {
     $this->assertIdentical('"213cc1365b96c310e92053c5551f0504"', $feed->etag->value);
     $this->assertIdentical('0', $feed->modified->value);
   }
+
 }