make a1t13 more linient

@test "[EXERCISE 13] Files 'file3' and 'file4' have read and write permissions for owner and no other permissions for others" {

    bash -c "$(awk '/# EXERCISE 13$/{flag=1; next} /# EXERCISE/{flag=0} flag' ./commands.sh)"

    assert_file_permission '600' './file3'

    assert_file_permission '600' './file4'

    # Check that owner has at least read/write (6xx) and others have no permissions (xx0)

    file3_permissions=$(stat -c "%a" './file3')

    file4_permissions=$(stat -c "%a" './file4')

    # Extract owner permissions (first digit) - should be 6 or 7

    file3_owner=${file3_permissions:0:1}

    file4_owner=${file4_permissions:0:1}

    # Extract others permissions (last digit) - should be 0

    file3_others=${file3_permissions:2:1}

    file4_others=${file4_permissions:2:1}

    # Check owner has at least read/write permissions (6 or 7)

    assert [ "$file3_owner" -ge "6" ]

    assert [ "$file4_owner" -ge "6" ]

    # Check others have no permissions (0)

    assert [ "$file3_others" -eq "0" ]

    assert [ "$file4_others" -eq "0" ]

}

@test "[EXERCISE 14] Directory 'uowm/cs' doesn't have read and write permissions" {