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 { ... }

Before submitting the PR make sure the following are checked:

• Wrote good commit messages.
• 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.
• Added an entry to the Changelog if the new code introduces user-observable changes. See changelog entry format.
• The PR relates to only one subject with a clear title
  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