class SyntaxTree::StringLiteral

def format(q)
  if parts.empty?
    q.text("#{q.quote}#{q.quote}")
    return
  end
  opening_quote, closing_quote =
    if !Quotes.locked?(self, q.quote)
      [q.quote, q.quote]
    elsif quote&.start_with?("%")
      [quote, Quotes.matching(quote[/%[qQ]?(.)/, 1])]
    else
      [quote, quote]
    end
  q.text(opening_quote)
  q.group do
    parts.each do |part|
      if part.is_a?(TStringContent)
        value = Quotes.normalize(part.value, closing_quote)
        first = true
        value.each_line(chomp: true) do |line|
          if first
            first = false
          else
            q.breakable_return
          end
          q.text(line)
        end
        q.breakable_return if value.end_with?("\n")
      else
        q.format(part)
      end
    end
  end
  q.text(closing_quote)
end