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

core/lib/Drupal/Component/Plugin/Exception/InvalidDecoratedMethod.php

@@ -7,6 +7,5 @@ use \BadMethodCallException;
 /**
  * Exception thrown when a decorator's _call() method is triggered, but the
  * decorated object does not contain the requested method.
- *
  */
 class InvalidDecoratedMethod extends BadMethodCallException implements ExceptionInterface { }

core/lib/Drupal/Component/Plugin/Exception/InvalidPluginDefinitionException.php

@@ -17,10 +17,12 @@ class InvalidPluginDefinitionException extends PluginException {
   /**
    * Constructs a InvalidPluginDefinitionException.
    *
+   * For the remaining parameters see \Exception.
+   *
    * @param string $plugin_id
    *   The plugin ID of the mapper.
    *
-   * @see \Exception for the remaining parameters.
+   * @see \Exception
    */
   public function __construct($plugin_id, $message = '', $code = 0, \Exception $previous = NULL) {
     $this->pluginId = $plugin_id;

core/lib/Drupal/Component/Plugin/Exception/PluginNotFoundException.php

@@ -10,10 +10,12 @@ class PluginNotFoundException extends PluginException {
   /**
    * Construct an PluginNotFoundException exception.
    *
+   * For the remaining parameters see \Exception.
+   *
    * @param string $plugin_id
    *   The plugin ID that was not found.
    *
-   * @see \Exception for remaining parameters.
+   * @see \Exception
    */
   public function __construct($plugin_id, $message = '', $code = 0, \Exception $previous = NULL) {
     if (empty($message)) {