Bug 1940020: Remove space in autogenerated username during self-registration

        $user->firstname        = $registration->firstname;

        $user->lastname         = $registration->lastname;

        $user->email            = $registration->email;

        $user->username         = get_new_username($user->firstname . $user->lastname);

        //remove spaces from firstname and lastname before concatenating

        $newusername = preg_replace('/\s+/', '', $user->firstname . $user->lastname);

        $user->username         = get_new_username($newusername);

        $user->passwordchange   = 1;

        // Points that indicate the user is a "new user" who should be restricted from spammy activities.