Fixes multi-line ReverseEach autocorrection

[siegfault]

When reverse and each are on separate lines, we end up autocorrecting

foo.reverse.
  each { ... }

to

foo.reverse_
  each { ... }

. With this change, we will instead update to

foo.reverse_each { ... }

---

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• Wrote good commit messages.
• Commit message starts with [Fix #issue-number] (if the related issue exists).
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• Squashed related commits together.
• Added tests.
• Added an entry to the Changelog if the new code introduces user-observable changes. See changelog entry format.
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  and description in grammatically correct, complete sentences.
• Run bundle exec rake default. It executes all tests and RuboCop for itself, and generates the documentation.

cc: @joe-sharp @dischorde

[siegfault]

This has the potential to violate line length once auto corrected. Are there any concerns around that?

[koic]

Yeah, I think broken code is more serious than the potential offense of Layout/LineLength. So, this change makes sense to me. Thank you!

[siegfault]

Thanks for looking at this so quickly!