Issue #2085435 by larowlan, dawehner: Fixed Comment edit page has the title 'Comment permalink'.

core/modules/comment/lib/Drupal/comment/CommentFormController.php

@@ -63,6 +63,11 @@ public function form(array $form, array &$form_state) {
       $author = $comment->name->value;
       $status = (isset($comment->status->value) ? $comment->status->value : COMMENT_NOT_PUBLISHED);
       $date = (!empty($comment->date) ? $comment->date : DrupalDateTime::createFromTimestamp($comment->created->value));
+      if (empty($form_state['comment_preview'])) {
+        $form['#title'] = t('Edit comment %title', array(
+          '%title' => $comment->subject->value,
+        ));
+      }
     }
     else {
       if ($user->isAuthenticated()) {

core/modules/comment/lib/Drupal/comment/Tests/CommentInterfaceTest.php

@@ -63,8 +63,12 @@ function testCommentInterface() {
     $this->setCommentSubject(TRUE);
     $this->setCommentPreview(DRUPAL_OPTIONAL);
 
-    // Test changing the comment author to "Anonymous".
     $this->drupalGet('comment/' . $comment->id() . '/edit');
+    $this->assertTitle(t('Edit comment @title | Drupal', array(
+      '@title' => $comment->subject->value,
+    )));
+
+    // Test changing the comment author to "Anonymous".
     $comment = $this->postComment(NULL, $comment->comment_body->value, $comment->subject->value, array('name' => ''));
     $this->assertTrue(empty($comment->name->value) && $comment->uid->target_id == 0, 'Comment author successfully changed to anonymous.');