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 #2822837 by vaplas, martin107, chiranjeeb2410, klausi, dawehner: Replace @expectedException @expectedExceptionMessage with $this->setExpectedException

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

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 #2822665 by martin107: LibraryDiscoveryParserTest::testBuilldByExtensionSimple() passes an unwanted parameter

Issue #2572801 by alexpott, vprocessor, andriyun, andypost, chishah92, Mile23, attiks, hussainweb, klausi, dawehner, pfrenssen: Fix 'Drupal.WhiteSpace.ScopeIndent' coding standard

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

Issue #2491155 by mikeburrelljr, Mac_Weber, opdavies: Update drupal.org and kernel.org URLs in core modules (Follow-up to 2489912)

Issue #2358981 by tadityar, tstoeckler, larowlan, mpdonadio, Devin Carlson: Provide a mechanism for dynamic library declarations

Issue #2378263 by Wim Leers: hook_library_alter() must be manually invoked by users of LibraryDiscovery, and has no test coverage

Issue #2328919 by Mile23, YesCT, tim.plunkett: Remove () from a bunch of @covers definitions in PHPUnit

Issue #2328111 by dawehner, martin107, neclimdul: Replace most instances of the DRUPAL_ROOT constant with the app.root container parameter.

Issue #2270323 by sun, dawehner, neclimdul: Remove DRUPAL_ROOT constant redefinitions from unit tests.

Issue #2307717 by Wim Leers, micbar: Fixed Inform Drupal in *.libraries.yml via a new per-JS file "minified" flag whether a JS file has been minified.

Issue #697760 by sun: Replace getInfo() in tests with native phpDoc + annotations (following PHPUnit).