[Fix #1389] Handle TypeError caused by passing array literals as arguments to File methods in Rails/RootPathnameMethods cop

[ydakuka]

Fix #1389

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• The PR relates to only one subject with a clear title and description in grammatically correct, complete sentences.
• Commit message starts with [Fix #issue-number] (if the related issue exists).
• Feature branch is up-to-date with master (if not - rebase it).
• Squashed related commits together.
• Added tests.
• Ran bundle exec rake default. It executes all tests and runs RuboCop on its own code.

[koic]

Suggested change

	* [#1389](https://github.com/rubocop/rubocop-rails/issues/1389): Handle TypeError caused by an array in `Rails/RootPathname` cop. ([@ydakuka][])
	* [#1389](https://github.com/rubocop/rubocop-rails/issues/1389): Handle `TypeError` caused by passing array literals as arguments to `File` methods in `Rails/RootPathnameMethods` cop. ([@ydakuka][])

[ydakuka]

done

[koic]

Can you take a look at the CI failure? Alternatively, you can try running bundle exec rake locally to see if it reproduces.

[ydakuka]

Can you take a look at the CI failure? Alternatively, you can try running bundle exec rake locally to see if it reproduces.

Fixed. I forgot the closing parenthesis in the changelog file. I usually run bundle exec rake default.