class Prism::Translation::Ripper::SexpBuilder

returns the arrays of [type, *children].
This class mirrors the ::Ripper::SexpBuilder subclass of ::Ripper that

def dedent_element(e, width) 

def dedent_element(e, width)
  if (n = dedent_string(e[1], width)) > 0
    e[2][1] += n
  end
  e
end

def on_error(mesg) 

def on_error(mesg)
  @error = mesg
end

def on_heredoc_dedent(val, width) 

def on_heredoc_dedent(val, width)
  sub = proc do |cont|
    cont.map! do |e|
      if Array === e
        case e[0]
        when :@tstring_content
          e = dedent_element(e, width)
        when /_add\z/
          e[1] = sub[e[1]]
        end
      elsif String === e
        dedent_string(e, width)
      end
      e
    end
  end
  sub[val]
  val
end