anchor.diff:      </p>
       <div id="penalty_decay_periods">
         <% if rule.object.type.to_s == "PenaltyDecayPeriodSubmissionRule" %>
  -        <% rule.fields_for :periods do |period_form| %>
  +        <%= rule.fields_for :periods do |period_form| %>
             <%= render :partial => 'penalty_decay_period',
                        :locals => {:penalty_decay_period => period_form.object,
                                    :pf => rule} %>
  
positive.code:     </p>
      <div id="grace_periods">
      <% if rule.object.type.to_s == "GracePeriodSubmissionRule" %>
       <% rule.fields_for :periods do |period_form| %>
         <%= render :partial => 'grace_period',
                    :locals => {:grace_period => period_form.object,
                                :pf => rule} %>
  
negative.code: <fieldset>
    <legend><%= t("assignment.submission_rules") %></legend>
  
    <%= f.fields_for :submission_rule do |rule| %>
      <h5><%= t("assignment.submission.penalty_rules") %></h5>
  
      <p>
  