Drupal 11 compatibility

Hello,

I have tested MR !5 and it's applied successfully. I've also checked that into Drupal 11 and it's working as expected as well.

Same here, adding https://git.drupalcode.org/project/classy/-/merge_requests/5.patch to my composer.json makes upgrade_status module happy ! And it works well with my theme.

Attaching the MR5 patch

Tried both patches just in case there was a difference:
https://www.drupal.org/project/classy/issues/3461089#comment-15720455 🐛 Drupal 11 compatibility RTBC
https://www.drupal.org/project/classy/issues/3461089#comment-15743743 🐛 Drupal 11 compatibility RTBC

but both gave the same result in upgrade_status 4.3.5: classy: 1263 warnings found.
They are all depreciation notices, nearly all of the first one in the list:

1. vendor\symfony\deprecation-contracts\function.php 25 Since twig/twig 3.12: Getting node "filter" on a "Twig\Node\Expression\FilterExpression" class is deprecated
2. dropbutton-wrapper.html.twig 13 Since twig/twig 3.12: Twig Filter "spaceless" is deprecated. See https://drupal.org/node/3071078.

link-formatter-link-separate.html.twig 15 Since twig/twig 3.12: Twig Filter "spaceless" is deprecated. See https://drupal.org/node/3071078.

3. select.html.twig 13 Since twig/twig 3.12: Twig Filter "spaceless" is deprecated. See https://drupal.org/node/3071078.
4. toolbar.html.twig 30 Since twig/twig 3.12: Twig Filter "spaceless" is deprecated. See https://drupal.org/node/3071078.

On php 8.3.11 & drupal 10.3.5