anchor.diff:  <table>
     <tr><td><%= label_tag "#{@robot.name}：" %></td></tr>
     <tr><td>
  -    <%= ("&nbsp;"*4).html_safe %>達成課題：
  +    <%= ("&nbsp;"*4).html_safe %>達成課題：<br />
       <%
         checked = f.object.my_challenges.presence || []
         GameDetail22nd.challenges.each do |key, value|
  
positive.code:     %>
    </td></tr>
    <tr><td>
      <%= ("&nbsp;"*4).html_safe %>合計
      <%= f.select :opponent_gaining_point, gaining_point_numbers %>点
    </td></tr>
    <tr><td>
  
negative.code:   <%#########################################################################%>
    <tr><td><%= label_tag "対戦相手：" %></td></tr>
    <tr><td>
      <%= ("&nbsp;"*4).html_safe %>達成課題：<br />
      <%
        checked = f.object.opponent_challenges.presence || []
        GameDetail22nd.challenges.each do |key, value|
  