Issue #3268818 by ravi.shankar, quietone: Fix class comment doc blocks in non tests 'Drupal.Commenting.DocComment.ShortSingleLine'

Issue #2665992 by alexpott, klausi, heykarthikwithu, xjm, tstoeckler: @file is not required for classes, interfaces and traits

Issue #2363341 by tim.plunkett, donquixote, adci_contributor: Throw exception in Drupal::service() and friends, if container not initialized yet