bbatsov/rubocop

### Bug fixes

* [#6993](https://github.com/rubocop/rubocop/pull/6993): Allowing for empty if blocks, preventing `Style/SafeNavigation` from crashing. ([@RicardoTrindade][])
* [#6995](https://github.com/rubocop/rubocop/pull/6995): Fix an incorrect auto-correct for `Style/RedundantParentheses` when enclosed in parentheses at `while-post` or `until-post`. ([@koic][])
* [#6996](https://github.com/rubocop/rubocop/pull/6996): Fix a false positive for `Style/RedundantFreeze` when freezing the result of `String#*`. ([@bquorning][])
* [#6998](https://github.com/rubocop/rubocop/pull/6998): Fix autocorrect of `Naming/RescuedExceptionsVariableName` to also rename all references to the variable. ([@Darhazer][])
* [#6992](https://github.com/rubocop/rubocop/pull/6992): Fix unknown default configuration for `Layout/IndentFirstParameter` cop. ([@drenmi][])
* [#6972](https://github.com/rubocop/rubocop/issues/6972): Fix a false positive for `Style/MixinUsage` when using inside block and `if` condition is after `include`. ([@koic][])
* [#6738](https://github.com/rubocop/rubocop/issues/6738): Prevent auto-correct conflict of `Style/Next` and `Style/SafeNavigation`. ([@hoshinotsuyoshi][])
* [#6847](https://github.com/rubocop/rubocop/pull/6847): Fix `Style/BlockDelimiters` to properly check if the node is chained when `braces_for_chaining` is set. ([@att14][])

[@RicardoTrindade]: https://github.com/RicardoTrindade
[@koic]: https://github.com/koic
[@bquorning]: https://github.com/bquorning
[@Darhazer]: https://github.com/Darhazer
[@drenmi]: https://github.com/drenmi
[@hoshinotsuyoshi]: https://github.com/hoshinotsuyoshi
[@att14]: https://github.com/att14