[Fix #8179] Fix an infinite correction loop for Layout/MultilineBlockLayout

[koic]

Fixes #8179.

This PR fixes an infinite correction loop error for Layout/MultilineBlockLayout when missing newline before opening parenthesis ( for block body.

# frozen_string_literal: true

foo do |o| (
    bar
  )
end

% rubocop -a --only Layout/MultilineBlockLayout
Inspecting 1 file
C

Offenses:

example.rb:3:12: C: [Corrected] Layout/MultilineBlockLayout: Block body
expression is on the same line as the block start.
foo do |o| ( ...
           ^

0 files inspected, 1 offense detected, 1 offense corrected
Infinite loop detected in /Users/koic/src/github.com/koic/rubocop-issues/8179/example.rb.
/Users/koic/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.85.1/lib/rubocop/runner.rb:276:in
`block in iterate_until_no_changes'
/Users/koic/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.85.1/lib/rubocop/runner.rb:272:in
`loop'
/Users/koic/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.85.1/lib/rubocop/runner.rb:272:in
`iterate_until_no_changes'
/Users/koic/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.85.1/lib/rubocop/runner.rb:243:in
`do_inspection_loop'
/Users/koic/.rbenv/versions/2.7.1/lib/ruby/gems/2.7.0/gems/rubocop-0.85.1/lib/rubocop/runner.rb:122:in
`block in file_offenses'

---

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• 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.

[tas50]

Thanks for the super fast fix @koic