htaccess doesnt work with spaces in usernames

using 4.2.14, I've noticed that htaccess folder protection doesnt work with usernames that have spaces in them.
.htgroup file has this:-
FOLDER_2: user1 Fred Bloggs User with spaces

for 3 users
user1
Fred Bloggs
User with spaces

when it should be

FOLDER_2: "user1" "Fred Bloggs" "User with spaces"

Is there a fix to the htgroup generating code available?

Fixed it myself
htpasswd.php
changed line 68
from
fputs($fn, "FOLDER_$folder_id: " . implode(" ", $logins). PHP_EOL);
to
fputs($fn, "FOLDER_$folder_id: " . "'" . implode("' '", $logins). "'". PHP_EOL);

seems to work

sorry, double post