class RuboCop::Cop::Style::RedundantHeredocDelimiterQuotes

def need_heredoc_delimiter_quotes?(node)
  heredoc_delimiter = node.source.delete(heredoc_type(node))
  return true unless heredoc_delimiter.start_with?("'", '"')
  node.loc.heredoc_end.source.strip.match?(/\W/) ||
    node.loc.heredoc_body.source.match?(STRING_INTERPOLATION_OR_ESCAPED_CHARACTER_PATTERN)
end