on_heredoc_dedent

# File ext/ripper/lib/ripper/sexp.rb, line 115
    def on_heredoc_dedent(val, width)
      val.map! do |e|
        next e if Symbol === e and /_content\z/ =~ e
        if Array === e and e[0] == :@tstring_content
          e = dedent_element(e, width)
        elsif String === e
          dedent_string(e, width)
        end
        e
      end
      val
    end