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

core/modules/block/src/Plugin/migrate/source/Block.php

@@ -138,7 +138,7 @@ class Block extends DrupalSqlBase {
         $settings['book']['block_mode'] = $this->variableGet('book_block_mode', 'all pages');
         break;
       case 'forum':
-        $settings['forum']['block_num'] = $this->variableGet('forum_block_num_'. $delta, 5);
+        $settings['forum']['block_num'] = $this->variableGet('forum_block_num_' . $delta, 5);
         break;
       case 'statistics':
         foreach (array('statistics_block_top_day_num', 'statistics_block_top_all_num', 'statistics_block_top_last_num') as $name) {

core/modules/block/src/Tests/BlockHookOperationTest.php

@@ -31,7 +31,7 @@ class BlockHookOperationTest extends WebTestBase {
     $this->drupalLogin($admin_user);
   }
 
-  /*
+  /**
    * Tests the block list to see if the test_operation link is added.
    */
   public function testBlockOperationAlter() {

core/modules/block/src/Tests/BlockInvalidRegionTest.php

@@ -59,4 +59,5 @@ class BlockInvalidRegionTest extends WebTestBase {
     $this->drupalPostForm('admin/config/development/performance', array(), 'Clear all caches');
     $this->assertNoRaw($warning_message, 'Disabled block in the invalid region will not trigger the warning.');
   }
+
 }

core/modules/block/src/Tests/BlockLanguageCacheTest.php

@@ -73,4 +73,5 @@ class BlockLanguageCacheTest extends WebTestBase {
       $this->assertText($edit['label']);
     }
   }
+
 }

core/modules/block/src/Tests/BlockRenderOrderTest.php

@@ -69,11 +69,12 @@ class BlockRenderOrderTest extends WebTestBase {
     foreach ($controller->loadMultiple() as $return_block) {
       $id = $return_block->id();
       if ($return_block_weight = $return_block->getWeight()) {
-        $this->assertTrue($test_blocks[$id]['weight'] == $return_block_weight, 'Block weight is set as "' . $return_block_weight  . '" for ' . $id . ' block.');
+        $this->assertTrue($test_blocks[$id]['weight'] == $return_block_weight, 'Block weight is set as "' . $return_block_weight . '" for ' . $id . ' block.');
         $position[$id] = strpos($test_content, Html::getClass('block-' . $test_blocks[$id]['id']));
       }
     }
     $this->assertTrue($position['stark_powered'] < $position['stark_by'], 'Blocks with different weight are rendered in the correct order.');
     $this->assertTrue($position['stark_drupal'] < $position['stark_by'], 'Blocks with identical weight are rendered in alphabetical order.');
   }
+
 }

core/modules/block/src/Tests/BlockTestBase.php

@@ -67,4 +67,5 @@ abstract class BlockTestBase extends WebTestBase {
       $block->delete();
     }
   }
+
 }

core/modules/block/src/Tests/BlockUiTest.php

@@ -119,12 +119,12 @@ class BlockUiTest extends WebTestBase {
     foreach ($this->blockValues as $values) {
       // Check if the region and weight settings changes have persisted.
       $this->assertOptionSelected(
-        'edit-blocks-' . $values['settings']['id']  . '-region',
+        'edit-blocks-' . $values['settings']['id'] . '-region',
         'header',
         'The block "' . $label . '" has the correct region assignment (header).'
       );
       $this->assertOptionSelected(
-        'edit-blocks-' . $values['settings']['id']  . '-weight',
+        'edit-blocks-' . $values['settings']['id'] . '-weight',
         $values['test_weight'],
         'The block "' . $label . '" has the correct weight assignment (' . $values['test_weight'] . ').'
       );

core/modules/block/src/Tests/NonDefaultBlockAdminTest.php

@@ -38,4 +38,5 @@ class NonDefaultBlockAdminTest extends WebTestBase {
     $this->drupalGet('admin/structure/block/list/' . $new_theme);
     $this->assertText('Bartik(' . t('active tab') . ')', 'Tab for non-default theme found.');
   }
+
 }

core/modules/block/tests/modules/block_test/block_test.module

@@ -2,7 +2,7 @@
 
 /**
  * @file
- *   Provide test blocks.
+ * Provide test blocks.
  */
 
 use Drupal\Core\Block\BlockPluginInterface;

core/modules/block/tests/modules/block_test/src/Controller/TestMultipleFormController.php

@@ -8,7 +8,7 @@ use Drupal\Core\Form\FormState;
 /**
  * Controller for block_test module
  */
-class TestMultipleFormController  extends ControllerBase {
+class TestMultipleFormController extends ControllerBase {
 
   public function testMultipleForms() {
     $form_state = new FormState();

core/modules/block/tests/modules/block_test/src/Plugin/Condition/BaloneySpam.php

@@ -11,7 +11,6 @@ use Drupal\Core\Condition\ConditionPluginBase;
  *   id = "baloney_spam",
  *   label = @Translation("Baloney spam"),
  * )
- *
  */
 class BaloneySpam extends ConditionPluginBase {
 

core/modules/block/tests/src/Kernel/BlockInterfaceTest.php

@@ -99,4 +99,5 @@ class BlockInterfaceTest extends KernelTestBase {
     // testing BlockBase's implementation, not the interface itself.
     $this->assertIdentical($display_block->getMachineNameSuggestion(), 'displaymessage', 'The plugin returned the expected machine name suggestion.');
   }
+
 }

core/modules/block/tests/src/Kernel/Migrate/d7/MigrateBlockTest.php

@@ -16,7 +16,7 @@ class MigrateBlockTest extends MigrateDrupal7TestBase {
  /**
    * {@inheritdoc}
    */
-  static $modules = [
+  public static $modules = [
     'block',
     'views',
     'comment',