fix: Incorporate pattern for thousand and decimal separator to restrict input to only special characters as valid values.

plugins/woocommerce/includes/admin/settings/class-wc-settings-general.php

@@ -260,7 +260,7 @@ class WC_Settings_General extends WC_Settings_Page {
 					'type'     => 'text',
 					'desc_tip' => true,
 					'custom_attributes' => array(
-						'pattern'  => '^[^a-zA-Z0-9]*([ ]|[^a-zA-Z0-9])[^a-zA-Z0-9]*$',
+						'pattern'  => '[^a-zA-Z\d]{1}',
 					),
 				),
 
@@ -273,7 +273,7 @@ class WC_Settings_General extends WC_Settings_Page {
 					'type'     => 'text',
 					'desc_tip' => true,
 					'custom_attributes' => array(
-						'pattern'  => '^[^a-zA-Z0-9]*([ ]|[^a-zA-Z0-9])[^a-zA-Z0-9]*$',
+						'pattern'  => '[^a-zA-Z\d]{1}',
 					),
 				),