class ERB::Compiler::TrimScanner

def trim_line2(line)
  head = nil
  line.scan(@scan_reg) do |tokens|
    tokens.each do |token|
      next if token.empty?
      head = token unless head
      if token == "%>\n" || token == "%>\r\n"
        yield('%>')
        if is_erb_stag?(head)
          yield(:cr)
        else
          yield("\n")
        end
        head = nil
      else
        yield(token)
        head = nil if token == "\n"
      end
    end
  end
end