Issue #3391355 by sebish, dpi, smustgrave:...

Issue #3391355 by sebish, dpi, smustgrave: \Drupal\Core\Config\StorageInterface::read is typehinted as possibly returning bool, but never returns true

core/lib/Drupal/Core/Config/StorageInterface.php

@@ -32,7 +32,7 @@ public function exists($name);
    * @param string $name
    *   The name of a configuration object to load.
    *
-   * @return array|bool
+   * @return array|false
    *   The configuration data stored for the configuration object name. If no
    *   configuration data exists for the given name, FALSE is returned.
    */