tn" aria-expanded="false" aria-label="{{ self.open_the_index() }}" data-close-text="{{ self.close_the_index() }}" data-open-text="{{ self.open_the_index() }}">{{ self.index_title() }}</button>
            <span class="no-button">{{ self.index_title() }}</span>
          </h2>
          {{ self.index() }}
        </div>
    </nav>

    <div class="content">
        <article id="maincontent" class="body">
            <div class="subtitle">
                {{ self.part() }} {{ chapter_config.part }} {{ self.ch