Unset additional product data if value is NULL || false || ' '

[kkrieger85]

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:

magento-lts/app/code/core/Mage/Catalog/Block/Product/View/Attributes.php

Line 69 in 5dee1c0

} elseif (is_null($value) || $value === false || $value === '') {

[addison74]

PR?