split collection description in 2 paragraphs

gistfile1.txt

//alt code smecher de la un client


{% assign descriptions = product.description | split: "<h5>" %}
      
      {% for description_block in descriptions %}

        {% if forloop.first == true %}
          {{ description_block }}
        {% else %}

          {% assign split_block = description_block | split: "</h5>" %}

          <div class="accordion" id="section{{forloop.index}}">
            <h5>{{ split_block[0] }}</h5>
          </div>
          <div class="content">
            {{ split_block[1] }}
          </div>

        {% endif %}

      {% endfor %}

shopify split collection description in 2 paragraphs

{% assign descriptions = collection.description | split: "<!-- split -->" %}
{% assign short_desc = descriptions[0] %}
{% assign long_desc = descriptions[1] %}

Then put the individual descriptions whereever you want them on the page with 
{{ short_desc }} and {{ long_desc }}, respectively.