*   New section _Troubleshooting_ in the _Autoloading and Reloading Constants_ guide.

    *Xavier Noria*

*   Rails 6 requires Ruby 2.5.0 or newer.

    *Jeremy Daer*, *Kasper Timm Hansen*


Please check [5-2-stable](https://github.com/rails/rails/blob/5-2-stable/guides/CHANGELOG.md) for previous changes.