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

core/modules/datetime/datetime.module

@@ -50,7 +50,6 @@ function datetime_help($route_name, RouteMatchInterface $route_match) {
  * same value for in both the local timezone and UTC.
  *
  * @param $date
- *
  */
 function datetime_date_default_time($date) {
   $date->setTime(12, 0, 0);

core/modules/datetime/src/Plugin/views/argument/Date.php

@@ -37,4 +37,5 @@ class Date extends NumericDate {
     // Pass in the string-field option.
     return $this->query->getDateFormat($this->getDateField(), $format, TRUE);
   }
+
 }

core/modules/datetime/src/Plugin/views/sort/Date.php

@@ -31,5 +31,4 @@ class Date extends NumericDate {
     return $this->query->getDateFormat($this->getDateField(), $format, TRUE);
   }
 
-
 }

core/modules/datetime/src/Tests/Views/FilterDateTimeTest.php

@@ -100,7 +100,7 @@ class FilterDateTimeTest extends DateTimeHandlerTestBase {
   }
 
   /**
-   *  Test between operations.
+   * Test between operations.
    */
   protected function _testBetween() {
     $view = Views::getView('test_filter_datetime');