class Haml::Compiler

def rstrip_buffer!(index = -1)
  last = @to_merge[index]
  if last.nil?
    push_silent("_hamlout.rstrip!", false)
    @dont_tab_up_next_text = true
    return
  end
  case last.first
  when :text
    last[1].rstrip!
    if last[1].empty?
      @to_merge.slice! index
      rstrip_buffer! index
    end
  when :script
    last[1].gsub!(/\(haml_temp, (.*?)\);$/, '(haml_temp.rstrip, \1);')
    rstrip_buffer! index - 1
  else
    raise SyntaxError.new("[HAML BUG] Undefined entry in Haml::Compiler@to_merge.")
  end
end