### Explanation
The {%- -%} syntax removes whitespace around the tag.
Key points:
- Without hyphens (standard {% %}):
```liquid
{% if product.available %}
In stock!
{% endif %}
In stock!
```
- With hyphens on both sides ({%- -%}):
```liquid
{%- if product.available -%}
In stock!
{%- endif -%}
In stock!
```
Reference: [Shopify Liquid Whitespace Control](https://shopify.dev/docs/api/liquid/basics/whitespace)