Issue #2089433 by ianthomas_uk, grom358, herom, thedavidmeister, visabhishek, longwave, Sweetchuck: Remove uses of deprecated XSS filter functions.

Issue #2121175 by Codenator, tim.plunkett, cosmicdreams, jayeshanandani, grom358, ianthomas_uk, Xano: Remove usage of drupal_get_form().

Issue #2219617 by visabhishek, galooph, joshtaylor, Cottser: Remove @ingroup themeable from preprocess function docblocks.

Issue #2152221 by IshaDakota, steveoliver, joelpittet, InternetDevels, rteijeiro, hussainweb, shanethehat, jenlampton, kpa, AnythonyR, EVIIILJ, kgoel, Cottser, dsdeiz, hanpersand: Convert theme_radios() to Twig

Revert "Issue #2152221 by IshaDakota, joelpittet, InternetDevels, rteijeiro | Cottser: Convert theme_radios() to Twig."

Oops. Bad commit credit. Re-committing.

This reverts commit 3b8d35aa.

Issue #2152221 by IshaDakota, joelpittet, InternetDevels, rteijeiro | Cottser: Convert theme_radios() to Twig.

Issue #2171071 by jessebeach, dawehner, chakrapani, longwave, Gábor Hojtsy, xjm, Wim Leers: Rename drupal_add_library() to _drupal_add_library() and remove its uses.

Issue #2203407 by nod_, sun: Replace #attached library array values with provider-namespaced strings.

Issue #2152209 by longwave, joelpittet, steveoliver, hussainweb, shanethehat, jenlampton, kpa, AnythonyR, EVIIILJ, kgoel, Cottser, dsdeiz, hanpersand: Convert theme_fieldset() to Twig.

Issue #2152211 by joelpittet, IshaDakota, rteijeiro, steveoliver, hussainweb, shanethehat, jenlampton, kpa, AnythonyR, EVIIILJ, kgoel, Cottser, dsdeiz, hanpersand: Convert theme_form() to Twig.

Issue #2152225 by longwave, JeroenT, steveoliver, joelpittet, hussainweb, shanethehat, jenlampton, kpa, AnythonyR, EVIIILJ, kgoel, Cottser, dsdeiz, hanpersand: Convert theme_select() to Twig

Issue #1938926 by sun, Cottser, joelpittet, pplantinga: Convert simpletest theme tables to table #type.

Issue #2070369 by herom, bdgreen, Mac_Weber, InternetDevels, sidharthap, JeroenT: Remove all calls to deprecated function language().

Issue #2045927 by herom, martin107, ianthomas_uk, Xano, michaellander, Sutharsan: Replace all drupal_alter() deprecated function calls.

Issue #1996238 by sun, nod_, damiankloip, Wim Leers, longwave, alexpott, Xano, mdrummond, Mark Carver, Jeff Burnz, highrockmedia, joelpittet, et al: Replace hook_library_info() by *.libraries.yml file.

Issue #2177469 by Gábor Hojtsy, Aron Novak, swentel, andypost, Berdir: Move node base widgets to the top level of the form.

Issue #2187735 by ianthomas_uk, Sutharsan, andypost: Add removal information to docblock of all @deprecated functions.

Issue #2192419 by sun, mgifford: Use a WCAG-compliant fieldset (fieldgroup) for #type radios/checkboxes.

Issue #1379070 by ocsilalala, rkjha, swentel, kid_icarus, Gisle: Field with multiple select list does not allow -None- to be a default value.

Issue #1939064 by joelpittet, pwieck, farrington, mark.labrecque, Cottser, InternetDevels, mdrummond, drupalninja99, BarisW, jenlampton: Convert theme_links() to Twig.

Issue #2152207 by steveoliver, joelpittet, gnuget, idflood, hussainweb, shanethehat, jenlampton, kpa, AnythonyR, EVIIILJ, kgoel, Cottser, dsdeiz, hanpersand: Convert theme_details() to Twig

Issue #2177653 by jessebeach, joelpittet, InternetDevels: Replace theme() with drupal_render() in form.inc.

Issue #2152229 by steveoliver, rteijeiro, joelpittet, JeroenT, InternetDevels, michamilz, burgerboydaddy, hussainweb, shanethehat, jenlampton, kpa, AnythonyR, EVIIILJ, kgoel, Cottser, dsdeiz, hanpersand: Convert theme_textarea() to Twig

Issue #2152213 by steveoliver, joelpittet, hussainweb, shanethehat, jenlampton, kpa, AnythonyR, EVIIILJ, kgoel, Cottser, dsdeiz, hanpersand: Convert theme_form_element() to Twig

Issue #2152231 by rteijeiro, steveoliver, joelpittet, hussainweb, shanethehat, jenlampton, kpa, AnythonyR, EVIIILJ, kgoel, Cottser, dsdeiz, hanpersand: Convert theme_vertical_tabs() to Twig

Somehow this broke PHPUnit, so rolling back for now.

This reverts commit 91b465bd.

Issue #1998638 by damiankloip, dawehner, kim.pepper, cosmicdreams, alexpott, larowlan, Damien Tournoud: Replace almost all remaining superglobals (, , etc.) with Symfony Request object.

Issue #1998638 by damiankloip, dawehner, kim.pepper, cosmicdreams, larowlan, Damien Tournoud: Replace all remaining superglobals (, , etc.) with Symfony Request object.

Issue #2121775 by jessebeach: Make the markup associated with the required star on field items silent.

Issue #675446 by mgifford, RobLoach, amateescu, nod_, longwave, oxyc, rteijeiro, tomyouds, Jelle_S, mcrittenden, Sutharsan, hansyg, Angry Dan, clemens.tolboom, droplet | Dave Reid: Change notice: Use jQuery UI Autocomplete.