### Bug fixes

* [#478](https://github.com/rubocop/rubocop-performance/pull/478): Fix `Performance/RedundantStringChars` cop error in case of implicit receiver. ([@viralpraxis][])
* [#480](https://github.com/rubocop/rubocop-performance/pull/480): Fix `Performance/Squeeze` cop error on frozen AST string node value. ([@viralpraxis][])

[@viralpraxis]: https://github.com/viralpraxis
