### New features

* [#4182](https://github.com/rubocop/rubocop/issues/4182): Add `Lint/AmbiguousRange` cop to check for ranges with ambiguous boundaries. ([@dvandersluis][])
* [#10000](https://github.com/rubocop/rubocop/pull/10000): Parallel static analysis by default. ([@koic][])
* [#9948](https://github.com/rubocop/rubocop/pull/9948): Support Ruby 2.7's pattern matching for `Style/ConditionalAssignment` cop. ([@koic][])
* [#9999](https://github.com/rubocop/rubocop/pull/9999): Add new `Style/RedundantSelfAssignmentBranch` cop. ([@koic][])

### Bug fixes

* [#9927](https://github.com/rubocop/rubocop/issues/9927): Indent hash values in `Layout/LineEndStringConcatenationIndentation`. ([@jonas054][])
* [#9959](https://github.com/rubocop/rubocop/issues/9959): Make `Style/IdenticalConditionalBranches` able to handle ternary `if`s. ([@dvandersluis][])
* [#9946](https://github.com/rubocop/rubocop/issues/9946): Avoid slow regexp matches in `Style/CommentedKeyword`. ([@jonas054][])
* [#7422](https://github.com/rubocop/rubocop/issues/7422): Treat constant assignment like other assignment in `Layout/SpaceAroundOperators`. ([@dvandersluis][])
* [#9953](https://github.com/rubocop/rubocop/issues/9953): Fix an infinite loop error and a false auto-correction behavior for `Layout/EndAlignment` when using a conditional statement in a method argument. ([@koic][])
* [#9958](https://github.com/rubocop/rubocop/issues/9958): Prevent an infinite loop when a detected method has fewer arguments than expected. ([@dvandersluis][])
* [#9977](https://github.com/rubocop/rubocop/issues/9977): Update `Layout/EmptyLineAfterGuardClause` to not register an offense if there is another expression following the guard clause on the same line. ([@dvandersluis][])
* [#9980](https://github.com/rubocop/rubocop/issues/9980): Fix a false positive for `Style/IdenticalConditionalBranches` when assigning to a variable used in a condition. ([@koic][])
* [#9975](https://github.com/rubocop/rubocop/issues/9975): Parentheses are always required for `Style/MethodDefParentheses` when a forwarding argument (`...`) is used. ([@dvandersluis][])
* [#9984](https://github.com/rubocop/rubocop/pull/9984): Fix false negatives involving heredocs for `Layout/SpaceBeforeComma`, `Layout/SpaceBeforeComment`, `Layout/SpaceBeforeSemicolon` and `Layout/SpaceInsideParens`. ([@dvandersluis][])
* [#9954](https://github.com/rubocop/rubocop/issues/9954): Fix infinite loop error for `Layout/HashAlignment` when `EnforcedStyle: with_fixed_indentation` is specified for `Layout/ArgumentAlignment`. ([@koic][])
* [#10002](https://github.com/rubocop/rubocop/issues/10002): Fix an incorrect auto-correct for `Lint/AmbiguousRegexpLiteral` when using nested method arguments without parentheses. ([@koic][])
* [#9952](https://github.com/rubocop/rubocop/pull/9952) [rubocop-rspec#1126](https://github.com/rubocop/rubocop-rspec/issues/1126): Fix `inherit_mode` for deeply nested configuration defined in extensions' default configuration. ([@pirj][])
* [#9957](https://github.com/rubocop/rubocop/issues/9957): Add `WholeWord` configuration to `Naming/InclusiveLanguage`'s `FlaggedTerms` config. ([@dvandersluis][])
* [#9970](https://github.com/rubocop/rubocop/pull/9970): Don't register an offense when sort method has arguments for `Style/RedundantSort` cop. ([@mtsmfm][])
* [#4097](https://github.com/rubocop/rubocop/issues/4097): Add require English for special globals. ([@biinari][])
* [#9955](https://github.com/rubocop/rubocop/issues/9955): Fix `Style/ExplicitBlockArgument` adding a second set of parentheses. ([@dvandersluis][])
* [#9973](https://github.com/rubocop/rubocop/issues/9973): Fix a false positive for `Layout/RescueEnsureAlignment` when aligned `rescue` keyword and leading dot. ([@koic][])
* [#9945](https://github.com/rubocop/rubocop/issues/9945): Fix auto-correction of lines in heredocs with only spaces in `Layout/TrailingWhitespace`. ([@jonas054][])

### Changes

* [#9989](https://github.com/rubocop/rubocop/issues/9989): Mark `Style/CommentedKeyword` as unsafe auto-correction. ([@koic][])
* [#9964](https://github.com/rubocop/rubocop/pull/9964): Make `Layout/LeadingCommentSpace` aware of `#:nodoc`. ([@koic][])
* [#9985](https://github.com/rubocop/rubocop/pull/9985): Mark `Style/IdenticalConditionalBranches` as unsafe auto-correction. ([@koic][])
* [#9962](https://github.com/rubocop/rubocop/issues/9962): Update `Style/WordArray` to register an offense in `percent` style if any values contain spaces. ([@dvandersluis][])
* [#9979](https://github.com/rubocop/rubocop/pull/9979): Enable basic autocorrection for `Style/Semicolon`. ([@dvandersluis][])

[@dvandersluis]: https://github.com/dvandersluis
[@koic]: https://github.com/koic
[@jonas054]: https://github.com/jonas054
[@pirj]: https://github.com/pirj
[@mtsmfm]: https://github.com/mtsmfm
[@biinari]: https://github.com/biinari
