wp-includes/l10n.php:1965Retrieves the list item separator based on the locale.
stringfunction wp_get_list_item_separator() { global $wp_locale; if ( ! ( $wp_locale instanceof WP_Locale ) ) { // Default value of WP_Locale::get_list_item_separator(). /* translators: Used between list items, there is a space after the comma. */ return __( ', ' ); } return $wp_locale->get_list_item_separator();}Introduced in 6.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/l10n.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.