### Bug fixes

* [#14176](https://github.com/rubocop/rubocop/pull/14176): Fix an error for `Style/MultilineIfModifier` when using nested modifier. ([@koic][])
* [#14077](https://github.com/rubocop/rubocop/issues/14077): Change `nil` representation in todo file comments. ([@jonas054][])
* [#14164](https://github.com/rubocop/rubocop/pull/14164): Fix an error for `Lint/UselessAssignment` when variables are assigned using unary operator in chained assignment and remain unreferenced. ([@koic][])
* [#14173](https://github.com/rubocop/rubocop/pull/14173): Fix an error for `Style/StringConcatenation` when using implicit concatenation with string interpolation. ([@koic][])
* [#14177](https://github.com/rubocop/rubocop/issues/14177): Fix false positives for `Style/SoleNestedConditional` when using nested `if` and `not` in condition. ([@koic][])
* [#14152](https://github.com/rubocop/rubocop/pull/14152): Fix `Layout/SpaceInsideArrayLiteralBrackets` cop error on array pattern without brackets. ([@viralpraxis][])
* [#14153](https://github.com/rubocop/rubocop/pull/14153): Fix `Style/PercentQLiterals` cop error on Unicode escape sequence. ([@viralpraxis][])

### Changes

* [#14082](https://github.com/rubocop/rubocop/issues/14082): Mark `Style/ComparableBetween` as unsafe. ([@earlopain][])
* [#14181](https://github.com/rubocop/rubocop/issues/14181): Make `Lint/DuplicateMethods` aware of Active Support's `delegate` method. ([@lovro-bikic][])
* [#14156](https://github.com/rubocop/rubocop/issues/14156): Make `Style/IfUnlessModifier` allow endless method definition in the `if` body. ([@koic][])

[@koic]: https://github.com/koic
[@jonas054]: https://github.com/jonas054
[@viralpraxis]: https://github.com/viralpraxis
[@earlopain]: https://github.com/earlopain
[@lovro-bikic]: https://github.com/lovro-bikic
