Issue #3183673 by jonathan1055, longwave: Fix 'Drupal.Commenting.DocComment.ShortFullStop' coding standard - part 1 auto-fixes

Issue #2935256 by Jo Fitzgerald, voleger, kim.pepper, ibustos, Yogesh Pawar, catch, jibran: Remove all usages of drupal_get_message and drupal_set_message in modules

Issue #2572619 by attiks, andypost, pfrenssen, vprocessor, tatarbj, andriyun, alexpott: Fix 'Drupal.Classes.ClassDeclaration' coding standard

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

Issue #2504139 by borisson_, Wim Leers, plach, prashantgoel, Fabianx, dawehner, David_Rothstein, effulgentsia: Blocks containing a form include the form action in the cache, so they always submit to the first URL the form was viewed at