class ERB::Compiler::TrimScanner

def explicit_trim_line(line)
  line.scan(@scan_reg) do |tokens|
    tokens.each do |token|
      next if token.empty?
      if @stag.nil? && /[ \t]*<%-/ =~ token
        yield('<%')
      elsif @stag && (token == "-%>\n" || token == "-%>\r\n")
        yield('%>')
        yield(:cr)
      elsif @stag && token == '-%>'
        yield('%>')
      else
        yield(token)
      end
    end
  end
end