bbatsov/rubocop

### Bug fixes

* [#6678](https://github.com/rubocop/rubocop/issues/6678): Fix `Lint/DisjunctiveAssignmentInConstructor` when it finds an empty constructor. ([@rmm5t][])
* Do not attempt to auto-correct mass assignment or optional assignment in `Rails/RelativeDateConstant`. ([@rrosenblum][])
* Fix auto-correction of `Style/WordArray` and `Style/SymbolArray` when all elements are on separate lines and there is a trailing comment after the closing bracket. ([@rrosenblum][])
* Fix an exception that occurs when auto-correcting `Layout/ClosingParenthesesIndentation` when there are no arguments. ([@rrosenblum][])

[@rmm5t]: https://github.com/rmm5t
[@rrosenblum]: https://github.com/rrosenblum