Issue #3392405: Module breaks image creation (and maybe other downloads)

documentation_generator.module

@@ -16,7 +16,7 @@ function documentation_generator_file_download($uri) {
   $target = $stream_wrapper_manager->getTarget($uri);
 
   if (($scheme == 'private')
-    && ($target == 'documentation.docx' || 'documentation.pdf')
+    && ($target == 'documentation.docx' || $target == 'documentation.pdf')
     && ($user = \Drupal::currentUser())
     && ($user->hasPermission('administer documentation generator'))
   ) {