anchor.diff:              <div class="tab-content">
                 <div id="date_range" class="tab-pane active">
                   <div id="dates_headings" class="row">
  -                  <div class="span3">
  +                  <div class="span4">
                       <p><h4>Start Date</h4></p>
                     </div>
  -                  <div class="span3">
  +                  <div class="span4">
                       <p><h4 class="pull-right">Due Date</h4></p>
                     </div>
                   </div>
                   <div class="row">
  -                  <div class="span6">
  +                  <div class="span8">
                       <div class="progress">
                         <%# TODO: extract to a helper method? %>
                         <% unless reservation_length > 31 %>
  
positive.code:                 </div>
  
                  <div id="res_dates" class="row">
                    <div class="span3">
                      <p><h4><%= @reservation.start_date.to_date.strftime("%a, %b %d, %Y") %></h4></p>
                    </div>
                    <div class="span3">
                      <p><h4 class="pull-right"><%= @reservation.due_date.to_date.strftime("%a, %b %d, %Y") %></h4></p>
                    </div>
                  </div>
  
negative.code:     </div>
  
      <%# right column  %>
      <div id="res_right_column" class="span8">
        <div class="row">
          <div class="span8">
            <%# DATE RANGE AND CALENDAR TABS AND CONTENT GO HERE  %>
  
            <div class="tabbable">
  