Shopify - Show total savings on cart page

gistfile1.txt

{% assign total_saving = 0 %}
{% for item in cart.items %}
{% if item.variant.compare_at_price > item.variant.price %}
{% capture saving %}{{ item.variant.compare_at_price | minus: item.variant.price }}{% endcapture %}
{% assign total_saving = saving | plus: total_saving %}
{% endif %} 
...rest of cart code within for loop
{% endfor %}

Display saving:

Saving - {{ total_saving | money }}

#quantity support
{% assign total_saving = 0 %}
{% for item in cart.items %}
{% if item.variant.compare_at_price > item.variant.price %}
{% capture saving %}{{ item.variant.compare_at_price | minus: item.variant.price }}{% endcapture %}
{% if item.variant.compare_at_price > item.variant.price %}
{% assign saving = item.variant.compare_at_price | minus: item.variant.price | times: item.quantity %}
{% assign total_saving = saving | plus: total_saving %}
{% endif %}
{% endif %}