diff --git a/core/lib/Drupal/Component/ProxyBuilder/ProxyBuilder.php b/core/lib/Drupal/Component/ProxyBuilder/ProxyBuilder.php
index 675fbdf..750f122 100644
--- a/core/lib/Drupal/Component/ProxyBuilder/ProxyBuilder.php
+++ b/core/lib/Drupal/Component/ProxyBuilder/ProxyBuilder.php
@@ -92,8 +92,6 @@ public function build($class_name, $proxy_class_name = '') {
         // class.
         if ($parent_interfaces = $interface->getInterfaceNames()) {
           foreach ($parent_interfaces as $parent_interface) {
-            if (isset($interfaces[$parent_interface])) {
-}
             unset($interfaces[$parent_interface]);
           }
         }
diff --git a/core/modules/file/src/Element/ManagedFile.php b/core/modules/file/src/Element/ManagedFile.php
index fbdce31..426f40c 100644
--- a/core/modules/file/src/Element/ManagedFile.php
+++ b/core/modules/file/src/Element/ManagedFile.php
@@ -97,7 +97,7 @@ public static function valueCallback(&$element, $input, FormStateInterface $form
               // Temporary files that belong to other users should never be
               // allowed.
               if ($file->isTemporary()) {
-                if ($file->getOwnerId() != \Drupal::currentUser()->id()) {  
+                if ($file->getOwnerId() != \Drupal::currentUser()->id()) {
                   $force_default = TRUE;
                   break;
                 }
diff --git a/core/tests/Drupal/KernelTests/Core/Database/InsertDefaultsTest.php b/core/tests/Drupal/KernelTests/Core/Database/InsertDefaultsTest.php
index 5964405..1d0b0c7 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/InsertDefaultsTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/InsertDefaultsTest.php
@@ -35,7 +35,7 @@ function testDefaultEmptyInsert() {
       // This is only executed if no exception has been thrown.
       $this->fail('Expected exception NoFieldsException has not been thrown.');
     }
-catch (NoFieldsException $e) {
+    catch (NoFieldsException $e) {
       $this->pass('Expected exception NoFieldsException has been thrown.');
     }
 
diff --git a/core/tests/Drupal/KernelTests/Core/Database/LargeQueryTest.php b/core/tests/Drupal/KernelTests/Core/Database/LargeQueryTest.php
index cd33254..4b24ebe 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/LargeQueryTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/LargeQueryTest.php
@@ -32,7 +32,7 @@ function testMaxAllowedPacketQueryTruncating() {
           db_query('SELECT name FROM {test} WHERE name = :name', array(':name' => $long_name));
           $this->fail("An exception should be thrown for queries larger than 'max_allowed_packet'");
         }
-catch (DatabaseException $e) {
+        catch (DatabaseException $e) {
           // Close and re-open the connection. Otherwise we will run into error
           // 2006 "MySQL server had gone away" afterwards.
           Database::closeConnection();
diff --git a/core/tests/Drupal/KernelTests/Core/Database/SchemaTest.php b/core/tests/Drupal/KernelTests/Core/Database/SchemaTest.php
index 3da41a7..7866146 100644
--- a/core/tests/Drupal/KernelTests/Core/Database/SchemaTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Database/SchemaTest.php
@@ -231,7 +231,7 @@ function testSchema() {
       db_create_table('test_timestamp', $table_specification);
     }
     catch (\Exception $e) {
-}
+    }
     $this->assertTrue(db_table_exists('test_timestamp'), 'Table with database specific datatype was created.');
   }