Escape product variant option names, as they can include quote charac…

…ters and this renders undesirably. (Shopify#3567)

snippets/product-variant-options.liquid

@@ -80,7 +80,7 @@
     <input
       type="radio"
       id="{{ input_id }}"
-      name="{{ input_name }}"
+      name="{{ input_name | escape }}"
       value="{{ value | escape }}"
       form="{{ product_form_id }}"
       {% if value.selected %}