url_title not set to lowercase by default

On this page: https://codeigniter.com/user_guide/tutor...items.html

it reads: "This contains a new function url_title(). This function - provided by the URL helper - strips down the string you pass it, replacing all spaces by dashes (-) and makes sure everything is in lowercase characters."

But looking at the function:

PHP Code:

function url_title(string $str, string $separator = '-', bool $lowercase = false): string { ... } 


the lowercase argument is set to false.

Is this intentional?