Fixed shortcode render for variations and backwards compatibility

Fixes #13949

includes/class-wc-product-variable.php

@@ -294,7 +294,7 @@ class WC_Product_Variable extends WC_Product {
 			'is_downloadable'       => $variation->is_downloadable(),
 			'is_virtual'            => $variation->is_virtual(),
 			'is_sold_individually'  => $variation->is_sold_individually() ? 'yes' : 'no',
-			'variation_description' => $variation->get_description(),
+			'variation_description' => wc_format_content( $variation->get_description() ),
 		) ), $this, $variation );
 	}
 

templates/single-product/add-to-cart/variation.php

@@ -16,7 +16,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 ?>
 <script type="text/template" id="tmpl-variation-template">
 	<div class="woocommerce-variation-description">
-		{{{ data.variation.description }}}
+		{{{ data.variation.variation_description }}}
 	</div>
 
 	<div class="woocommerce-variation-price">