Get the human readable comments and quantities for the task types.

def _get_comments(group_tasks):
    """
    Get the human readable comments and quantities for the task types.
    """
    comments = {}
    for status, human in _COMMENTS:
        num_tasks = _get_number_of_tasks_for(status, group_tasks)
        if num_tasks:
            space = "    " if status in _PENDING_SUB_STATUSES else ""
            comments[status] = '{space}* {num_tasks} {human}:\n'.format(
                space=space,
                num_tasks=num_tasks,
                human=human)
    return comments