Terminate the program with the given status code.

def exit(status=0):
    """
    Terminate the program with the given status code.
    """
    if status == 0:
        lab.io.printf(lab.io.Colours.GREEN, "Done.")
    else:
        lab.io.printf(lab.io.Colours.RED, "Error {0}".format(status))
    sys.exit(status)