Issue #2853503 by Aki Tendo, alexpott, larowlan, Wim Leers, klausi, fgm, dawehner, mondrake, catch, Berdir, neclimdul, borisson_: Remove all assert('string') calls from Drupal core because deprecated in PHP 7.2

Issue #2909368 by mfernea, reflie, zaporylie: Fix 'Drupal.Commenting.VariableComment.InlineVariableName' coding standard

Issue #2901726 by mfernea, gmario, finn.lewis, robertoperuzzo, rachel_norfolk: Fix 'Squiz.Functions.MultiLineFunctionDeclaration' coding standard

Issue #2705037 by jhedstrom, Dinesh18, dawehner, Wim Leers, larowlan: Asset library DX: Non-helpful fatal error if CSS isn't nested under an existing category

Issue #2776975 by joelpittet, dawehner, tim.plunkett, xjm, pfrenssen: March 3, 2017: Convert core to array syntax coding standards for Drupal 8.3.x RC phase

Issue #936316 by vaplas, johns996, aerozeppelin, mgifford, gapple, gnuget: CSS aggregation strips some essential whitespace within strings

Revert "Issue #2808063 by vaplas, martin107, Chi, Wim Leers, catch, dawehner, alexpott: LibraryDiscoveryParser::buildByExtension() doesn't validate that extensions exist"

This reverts commit a68c44f4.

Issue #2808063 by vaplas, martin107, Chi, Wim Leers, catch, dawehner, alexpott: LibraryDiscoveryParser::buildByExtension() doesn't validate that extensions exist

Issue #2647916 by Lendude, Wim Leers, dawehner: Views ajax modals stop working in certain scenarios: due to JS settings caching, AJAX responses may set wrong ajaxPageState.libraries, causing problems for subsequent AJAX requests/responses

Issue #1920902 by neclimdul, larowlan, alexpott, chx, sun, jthorson, damiankloip, Berdir, Mixologic, YesCT, hussainweb, rcaracaus, cweagans, catch, jibran, msonnabaum, dawehner, webchick, anavarre, heyrocker: Add a Drupal Yaml wrapper so we can default to PECL Yaml component if it is available

Issue #2572777 by andypost, alexpott, attiks, andriyun: Fix 'Squiz.Strings.ConcatenationSpacing' coding standard

Issue #2707641 by alexpott, anoopjohn: Ensure core compliance to Drupal.Commenting.FunctionComment.ParamCommentIndentation (part 2)

Issue #2612334 by NickWilde: Remove dead code in \Drupal\Core\Asset\[Css|Js]Collection[Grouper|Optimizer]

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

Issue #2686595 by sidharthap: LibraryDiscoveryCollector does not need to override properties of the parent class

Issue #1494670 by Liam Morland, jhedstrom, Wim Leers, mfb: References to CSS, JS, and similar files should be root-relative URLs: avoids mixed content warnings & fewer bytes to send

Issue #2603138 by catch, Wim Leers, tim.plunkett, chx, Fabianx, effulgentsia: CSS/JS asset caching can easily be trashed

Issue #2603372 by heykarthikwithu: Remove unused variable in LibraryDiscovery::getLibrariesByExtension()

Issue #2597359 by Wim Leers: Require responses with attachments to contain the final attachment values

Issue #2575735 by almaudoh: LibraryDiscoveryCollector::reset() does not properly reset its $cid, resulting in loading wrong library assets if the active theme changes

Issue #2497667 by almaudoh, Wim Leers, Cottser, Fabianx, jaxxed: Add libraries-extend to themes' *.info.yml

Issue #2451411 by almaudoh, Shamsher_Alam, lauriii, borisson_, cilefen, davidhernandez, Cottser, Wim Leers, joelpittet: Add libraries-override to themes' *.info.yml

Issue #2557519 by alexpott, joelpittet: Remove many usages SafeMarkup::checkPlain() and replace with Html::escape()

Issue #977844 by Wim Leers: Remove the 'every_page' option for CSS/JS assets: it is confusing, even damaging

Revert "Revert "Issue #2510104 by pwolanin, nod_, Fabianx, Wim Leers, droplet, Pere Orga: Convert drupalSettings from JavaScript to JSON, to allow for CSP in the future""

This reverts commit e8e883f9.

Issue #2538274 by pwolanin, Wim Leers, dawehner: DbUpdateController has broken mainteneance mode logic, and update.php doesn't run due to aggregated JS assets

Revert "Issue #2510104 by pwolanin, nod_, Fabianx, Wim Leers, droplet, Pere Orga: Convert drupalSettings from JavaScript to JSON, to allow for CSP in the future"

This reverts commit 94615a13.

Issue #2510104 by pwolanin, nod_, Fabianx, Wim Leers, droplet, Pere Orga: Convert drupalSettings from JavaScript to JSON, to allow for CSP in the future

Issue #1392754 by tss, justAChris, jhodgdon: Comply with new documentation standards for @file for namespaced class files