Source

File: wp-includes/category-template.php

function get_the_term_list( $post_id, $taxonomy, $before = '', $sep = '', $after = '' ) {
	$terms = get_the_terms( $post_id, $taxonomy );

	if ( is_wp_error( $terms ) ) {
		return $terms;
	}

	if ( empty( $terms ) ) {
		return false;
	}

	$links = array();

	foreach ( $terms as $term ) {
		$link = get_term_link( $term, $taxonomy );
		if ( is_wp_error( $link ) ) {
			return $link;
		}
		$links[] = '<a href="' . esc_url( $link ) . '" rel="tag">' . $term->name . '</a>';
	}

	/**
	 * Filters the term links for a given taxonomy.
	 *
	 * The dynamic portion of the filter name, `$taxonomy`, refers
	 * to the taxonomy slug.
	 *
	 * @since 2.5.0
	 *
	 * @param string[] $links An array of term links.
	 */
	$term_links = apply_filters( "term_links-{$taxonomy}", $links );  // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores

	return $before . join( $sep, $term_links ) . $after;
}