Issue #3165065 by sarvjeetsingh, Abhijith S, joachim: PluginWithFormsInterface...

Issue #3165065 by sarvjeetsingh, Abhijith S, joachim: PluginWithFormsInterface and PluginWithFormsTrait should reference each other in docs

(cherry picked from commit 32d6d3b4)

core/lib/Drupal/Core/Plugin/PluginWithFormsTrait.php

@@ -8,7 +8,7 @@
 trait PluginWithFormsTrait {
 
   /**
-   * {@inheritdoc}
+   * Implements \Drupal\Core\Plugin\PluginWithFormsInterface::getFormClass().
    */
   public function getFormClass($operation) {
     if (isset($this->getPluginDefinition()['forms'][$operation])) {
@@ -20,7 +20,7 @@ public function getFormClass($operation) {
   }
 
   /**
-   * {@inheritdoc}
+   * Implements \Drupal\Core\Plugin\PluginWithFormsInterface::hasFormClass().
    */
   public function hasFormClass($operation) {
     return !empty($this->getFormClass($operation));