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Unset attribute if not set instead of settings the attributes value to "no".
If "no" should be shown, then attribute should be used with yes/no instead of letting the attributes value empty.
This leads to displaying empty product attributes in attribute tab on product detail page
Unset attribute if not set instead of settings the attributes value to "no".
If "no" should be shown, then attribute should be used with yes/no instead of letting the attributes value empty. This leads to displaying empty product attributes in attribute tab on product detail page
Ref: https://github.com/OpenMage/magento-lts/blob/5dee1c0988e5ebd7fb458d6b72163c69a545c53f/app/code/core/Mage/Catalog/Block/Product/View/Attributes.php#L69