anchor.diff:                <div class="nav flex-column nav-pills" id="v-pills-tab" role="tablist" aria-orientation="vertical">
                   <% @solution.reviews.final.each_with_index do |review, index| %>
                     <a href="#<%= "review_#{index}" %>" id="#<%= "review_#{index}" %>" class="nav-link<%= ' active' if index == 0 %>"
  -                     aria-controls="#<%= "review_#{index}" %>" role="tab" data-toggle="pill" aria-selected="<%= index == 0 %>">
  +                     aria-controls="#<%= "review_#{index}" %>" role="tab" data-bs-toggle="pill" aria-selected="<%= index == 0 %>">
                       Revisión de <%= review.reviewer.full_name %>
                       <% if review.reviewer.teacher? %>
                         (docente)
  
positive.code:           <div class="nav flex-column nav-pills" id="v-pills-tab" role="tablist" aria-orientation="vertical">
              <% @reviews.each_with_index do |review, index| %>
                <a href="#<%= "rreview_#{index}" %>" id="#<%= "rreview_#{index}" %>" class="nav-link<%= ' active' if index == 0 %>"
                   aria-controls="#<%= "rreview_#{index}" %>" role="tab" data-toggle="pill" aria-selected="<%= index == 0 %>">
                  Revisión para <%= review.solution.author.full_name %>
                  <% if review.reviewer.teacher? %>
                    (docente)
  
negative.code: 
  <nav>
    <div class="nav nav-tabs" id="nav-tab" role="tablist">
      <a class="nav-item nav-link active" id="nav-solution-tab" data-bs-toggle="tab" href="#nav-solution" role="tab" aria-controls="nav-solution" aria-selected="true">Revisiones recibidas</a>
      <a class="nav-item nav-link" id="nav-reviews-tab" data-bs-toggle="tab" href="#nav-reviews" role="tab" aria-controls="nav-reviews" aria-selected="false">Revisiones realizadas</a>
    </div>
  </nav>
  <div class="tab-content" id="nav-tabContent">
  