anchor.diff:  <div class="radio">
     <label>
       <input name="assignment[teamset_plan]" id="teamset_copy" type="radio"
  -           value="copy">
  +           value="copy" <% if asgn.teamset_plan == "copy" %>checked<% end %>>
       <strong>Copy existing teamset:</strong> clones the teams from an existing
       teamset, so changes to one set will not affect the other.
       <% if @legal_actions[:copy][:existing] %>
  
positive.code: <div class="radio">
    <label>
      <input name="assignment[teamset_plan]" id="teamset_none" type="radio"
             value="none" <% if @legal_actions[:no_teams][:checked] %>checked<% end %>>
      <strong>No teams:</strong> this assignment will be submitted individually
    </label>
  </div>
  
negative.code: <div class="radio">
    <label>
      <input name="assignment[teamset_plan]" id="teamset_new" type="radio"
             value="new" <% if asgn.teamset_plan == "new" || @legal_actions[:new][:checked] %>checked<% end %>>
      <strong>New teamset:</strong> after creating this assignment, go to the Teams
      page to create a new set of teams.
      <% if @legal_actions[:new][:existing] %>
  