Issue #2197091 by kirby14, undertext, lhangea, hussainweb, ACF, smiro, visabhishek | ivanjaros: Fixed Class HTML attribute is present even when no class is assigned to the list.

Issue #2081153 by YesCT, lauriii, rdatar, miraj9093, Enxebre, smiro, alexpott: Remove unused local variables from core/tests.

Issue #1189804 by cosmicdreams, jessebeach, martin107, mgifford, dcmouyard, pwieck, smiro | Jeff Burnz: Convert aggregator-feed-source.html.twig to HTML5.

Revert "Issue #1189804 by cosmicdreams, jessebeach, mgifford, pwieck, smiro, dcmouyard: Convert aggregator-feed-source.html.twig to HTML5."

This reverts commit 5ca04d67.

Issue #1189804 by cosmicdreams, jessebeach, mgifford, pwieck, smiro, dcmouyard: Convert aggregator-feed-source.html.twig to HTML5.

Issue #2081167 by smiro: Remove Unused local variable  from /core/modules/block/custom_block/lib/Drupal/custom_block/CustomBlockStorageController.php.

Issue #2081189 by mrsinguyen, smiro: Remove Unused local variable  from /core/modules/language/lib/Drupal/language/HttpKernel/PathProcessorLanguage.php.

Issue #2081175 by smiro: Remove Unused local variable  from /serialization/lib/Drupal/serialization/RegisterSerializationClassesCompilerPass.php.

Issue #2081177 by smiro: Remove Unused local variable  from /core/modules/menu_link/lib/Drupal/menu_link/MenuLinkStorageController.php.

Issue #2081155 by smiro: Remove Unused local variable  from /core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterCaption.php.

Issue #2081171 by smiro: Remove Unused local variable  from /core/modules/ckeditor/ckeditor.admin.inc.

Issue #2081197 by smiro: Remove Unused local variable $links from /core/modules/hal/lib/Drupal/hal/Normalizer/EntityNormalizer.php.

Issue #2081165 by smiro: Remove Unused local variable  from /core/modules/datetime/lib/Drupal/datetime/Tests/DatetimeFieldTest.php.

Issue #2081195 by smiro: Remove Unused local variable  from taxonomy/Plugin/field/formatter/EntityReferenceTaxonomyTermRssFormatter.php.