Add RuboCop methods

[ksss]

• RuboCop::AST::ProcessedSource#[]
  • source: https://github.com/rubocop/rubocop-ast/blob/69efa169c3d2dd0b28669a717bd3543630576358/lib/rubocop/ast/processed_source.rb#L135-L137
• RuboCop::Cop::Util#comment_line?
  • source: https://github.com/rubocop/rubocop/blob/15ed842f772c51d616ce282f8e28f58f3fbe4513/lib/rubocop/cop/util.rb#L17-L19

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rubocop-ast

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rubocop

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@kozy4324, please review this pull request.
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After that, the PR author or the reviewers can merge this PR.
Just comment /merge to merge this PR.

[kozy4324]

APPROVE

[ksss]

/merge

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[ksss]

😎