{% include '_macros/potato-captcha.html' %}
<div class="feedback-container">
  <div class="feedback-inner">
    <div class="feedback modal">
      <form method="post" class="feedback-form form-modal">
        <h2>{{ _('Feedback') }}</h2>
        <a href="#" class="form-close">&times;</a>
        <p>
          <textarea name="feedback" placeholder="{{ _('Tell us why we rock. Or how we can rock harder.') }}" required></textarea>
        </p>
        <p class="form-footer">
          {{ potato_captcha() }}
          <button class="btn btn-big" type="submit">{{ _('Submit') }}</button>
        </p>
      </form>
    </div>
  </div>
</div>

{% include '_macros/potato-captcha.html' %}
<div class="feedback-container">
  <div class="feedback-inner">
    <div class="feedback modal">
      <form method="post" class="feedback-form form-modal">
        <h2>{{ _('Feedback') }}</h2>
        <a title="" class="form-close">&times;</a>
        <p>
          <textarea name="feedback" placeholder="{{ _('Tell us why we rock. Or how we can rock harder.') }}" required></textarea>
        </p>
        <p class="form-footer">
          {{ potato_captcha() }}
          <button class="btn btn-big" type="submit">{{ _('Submit') }}</button>
        </p>
      </form>
    </div>
  </div>
</div>

Use title='' instead of href
Use title='' instead of href
